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13999999 = 135032141
BaseRepresentation
bin110101011001…
…111101111111
3222100021101111
4311121331333
512040444444
61220022451
7226666216
oct65317577
928307344
1013999999
1179a2452
124831a27
132b92430
141c0607d
151368234
hexd59f7f

13999999 has 8 divisors (see below), whose sum is σ = 15113952. Its totient is φ = 12891360.

The previous prime is 13999981. The next prime is 14000029. The reversal of 13999999 is 99999931.

It is a happy number.

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 13999999 - 27 = 13999871 is a prime.

It is a Duffinian number.

13999999 is a modest number, since divided by 9999 gives 1399 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13999919) 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, 5469 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (1889244).

Almost surely, 213999999 is an apocalyptic number.

13999999 is a deficient number, since it is larger than the sum of its proper divisors (1113953).

13999999 is a wasteful number, since it uses less digits than its factorization.

13999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its digits is 1594323, while the sum is 58.

The square root of 13999999 is about 3741.6572531433. The cubic root of 13999999 is about 241.0142206791.

It can be divided in two parts, 1 and 3999999, that added together give a square (4000000 = 20002).

The spelling of 13999999 in words is "thirteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".

Divisors: 1 13 503 2141 6539 27833 1076923 13999999