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13489031 = 192924481
BaseRepresentation
bin110011011101…
…001110000111
3221101022110202
4303131032013
511423122111
61201041115
7222440423
oct63351607
927338422
1013489031
117683566
12462619b
132a4399a
141b11b83
1512b6b3b
hexcdd387

13489031 has 8 divisors (see below), whose sum is σ = 14689200. Its totient is φ = 12337920.

The previous prime is 13488997. The next prime is 13489037. The reversal of 13489031 is 13098431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13489031 - 214 = 13472647 is a prime.

It is a super-2 number, since 2×134890312 = 363907914637922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13488985 and 13489003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13489037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11690 + ... + 12791.

It is an arithmetic number, because the mean of its divisors is an integer number (1836150).

Almost surely, 213489031 is an apocalyptic number.

13489031 is the 1643-rd centered decagonal number.

13489031 is a deficient number, since it is larger than the sum of its proper divisors (1200169).

13489031 is a wasteful number, since it uses less digits than its factorization.

13489031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24529.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 13489031 is about 3672.7416190089. The cubic root of 13489031 is about 238.0456506834.

The spelling of 13489031 in words is "thirteen million, four hundred eighty-nine thousand, thirty-one".

Divisors: 1 19 29 551 24481 465139 709949 13489031