131664723 has 4 divisors (see below), whose sum is σ = 175552968. Its totient is φ = 87776480.

The previous prime is 131664713. The next prime is 131664733. The reversal of 131664723 is 327466131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327466131 = 3 ⋅109155377.

It is an interprime number because it is at equal distance from previous prime (131664713) and next prime (131664733).

It is a cyclic number.

It is not a de Polignac number, because 131664723 - 2⁴ = 131664707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131664713) 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, 21944118 + ... + 21944123.

It is an arithmetic number, because the mean of its divisors is an integer number (43888242).

Almost surely, 2^131664723 is an apocalyptic number.

131664723 is a deficient number, since it is larger than the sum of its proper divisors (43888245).

131664723 is an equidigital number, since it uses as much as digits as its factorization.

131664723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43888244.

The product of its digits is 18144, while the sum is 33.

The square root of 131664723 is about 11474.5249574873. The cubic root of 131664723 is about 508.7328828503.

The spelling of 131664723 in words is "one hundred thirty-one million, six hundred sixty-four thousand, seven hundred twenty-three".