131640764 has 12 divisors (see below), whose sum is σ = 234718344. Its totient is φ = 64578384.

The previous prime is 131640763. The next prime is 131640767. The reversal of 131640764 is 467046131.

It is a self number, because there is not a number n which added to its sum of digits gives 131640764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131640763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310262 + ... + 310685.

It is an arithmetic number, because the mean of its divisors is an integer number (19559862).

Almost surely, 2^131640764 is an apocalyptic number.

It is an amenable number.

131640764 is a deficient number, since it is larger than the sum of its proper divisors (103077580).

131640764 is a wasteful number, since it uses less digits than its factorization.

131640764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621004 (or 621002 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 131640764 is about 11473.4809016270. The cubic root of 131640764 is about 508.7020229756.

Adding to 131640764 its reverse (467046131), we get a palindrome (598686895).

The spelling of 131640764 in words is "one hundred thirty-one million, six hundred forty thousand, seven hundred sixty-four".