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13208839 = 77325849
BaseRepresentation
bin110010011000…
…110100000111
3220212002010021
4302120310013
511340140324
61151040011
7220162510
oct62306407
926762107
1013208839
117501aa6
124510007
1329762a7
141a7ba07
15125dae4
hexc98d07

13208839 has 8 divisors (see below), whose sum is σ = 15303200. Its totient is φ = 11166336.

The previous prime is 13208827. The next prime is 13208851. The reversal of 13208839 is 93880231.

It is an interprime number because it is at equal distance from previous prime (13208827) and next prime (13208851).

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 13208839 - 217 = 13077767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13208809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12414 + ... + 13435.

It is an arithmetic number, because the mean of its divisors is an integer number (1912900).

Almost surely, 213208839 is an apocalyptic number.

13208839 is a deficient number, since it is larger than the sum of its proper divisors (2094361).

13208839 is an equidigital number, since it uses as much as digits as its factorization.

13208839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25929.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 13208839 is about 3634.3966486887. The cubic root of 13208839 is about 236.3858895536.

The spelling of 13208839 in words is "thirteen million, two hundred eight thousand, eight hundred thirty-nine".

Divisors: 1 7 73 511 25849 180943 1886977 13208839