131664729 has 8 divisors (see below), whose sum is σ = 200632000. Its totient is φ = 75236976.

The previous prime is 131664713. The next prime is 131664733. The reversal of 131664729 is 927466131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131664729 - 2⁴ = 131664713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131664739) 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, 3134854 + ... + 3134895.

It is an arithmetic number, because the mean of its divisors is an integer number (25079000).

Almost surely, 2^131664729 is an apocalyptic number.

It is an amenable number.

131664729 is a deficient number, since it is larger than the sum of its proper divisors (68967271).

131664729 is an equidigital number, since it uses as much as digits as its factorization.

131664729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269759.

The product of its digits is 54432, while the sum is 39.

The square root of 131664729 is about 11474.5252189361. The cubic root of 131664729 is about 508.7328905780.

The spelling of 131664729 in words is "one hundred thirty-one million, six hundred sixty-four thousand, seven hundred twenty-nine".