131646239 has 4 divisors (see below), whose sum is σ = 131710656. Its totient is φ = 131581824.

The previous prime is 131646211. The next prime is 131646241. The reversal of 131646239 is 932646131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932646131 = 71 ⋅13135861.

It is a cyclic number.

It is not a de Polignac number, because 131646239 - 2¹² = 131642143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131646199 and 131646208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131646439) 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, 29039 + ... + 33264.

It is an arithmetic number, because the mean of its divisors is an integer number (32927664).

Almost surely, 2^131646239 is an apocalyptic number.

131646239 is a deficient number, since it is larger than the sum of its proper divisors (64417).

131646239 is an equidigital number, since it uses as much as digits as its factorization.

131646239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64416.

The product of its digits is 23328, while the sum is 35.

The square root of 131646239 is about 11473.7194928236. The cubic root of 131646239 is about 508.7090752617.

The spelling of 131646239 in words is "one hundred thirty-one million, six hundred forty-six thousand, two hundred thirty-nine".