131536123 has 4 divisors (see below), whose sum is σ = 139273560. Its totient is φ = 123798688.

The previous prime is 131536109. The next prime is 131536129. The reversal of 131536123 is 321635131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131536123 - 2¹⁷ = 131405051 is a prime.

It is a super-2 number, since 2×131536123² = 34603503307742258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131536129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3868693 + ... + 3868726.

It is an arithmetic number, because the mean of its divisors is an integer number (34818390).

Almost surely, 2^131536123 is an apocalyptic number.

131536123 is a deficient number, since it is larger than the sum of its proper divisors (7737437).

131536123 is an equidigital number, since it uses as much as digits as its factorization.

131536123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737436.

The product of its digits is 1620, while the sum is 25.

The square root of 131536123 is about 11468.9198706766. The cubic root of 131536123 is about 508.5671984795.

The spelling of 131536123 in words is "one hundred thirty-one million, five hundred thirty-six thousand, one hundred twenty-three".