131664619 has 2 divisors, whose sum is σ = 131664620. Its totient is φ = 131664618.

The previous prime is 131664613. The next prime is 131664641. The reversal of 131664619 is 916466131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131664619 - 2⁹ = 131664107 is a prime.

It is a super-2 number, since 2×131664619² = 34671143792830322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131664613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65832309 + 65832310.

It is an arithmetic number, because the mean of its divisors is an integer number (65832310).

Almost surely, 2^131664619 is an apocalyptic number.

131664619 is a deficient number, since it is larger than the sum of its proper divisors (1).

131664619 is an equidigital number, since it uses as much as digits as its factorization.

131664619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 131664619 is about 11474.5204257084. The cubic root of 131664619 is about 508.7327489034.

The spelling of 131664619 in words is "one hundred thirty-one million, six hundred sixty-four thousand, six hundred nineteen".