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139131 = 335153
BaseRepresentation
bin100001111101111011
321001212000
4201331323
513423011
62552043
71116426
oct417573
9231760
10139131
1195593
1268623
134b435
14389bd
152b356
hex21f7b

139131 has 8 divisors (see below), whose sum is σ = 206160. Its totient is φ = 92736.

The previous prime is 139123. The next prime is 139133. The reversal of 139131 is 131931.

It is not a de Polignac number, because 139131 - 23 = 139123 is a prime.

It is a super-2 number, since 2×1391312 = 38714870322, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139131.

It is not an unprimeable number, because it can be changed into a prime (139133) 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, 2550 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (25770).

2139131 is an apocalyptic number.

139131 is a deficient number, since it is larger than the sum of its proper divisors (67029).

139131 is an equidigital number, since it uses as much as digits as its factorization.

139131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162 (or 5156 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 139131 is about 373.0026809555. The cubic root of 139131 is about 51.8172827847.

The spelling of 139131 in words is "one hundred thirty-nine thousand, one hundred thirty-one".

Divisors: 1 3 9 27 5153 15459 46377 139131