131694379 has 2 divisors, whose sum is σ = 131694380. Its totient is φ = 131694378.

The previous prime is 131694373. The next prime is 131694403. The reversal of 131694379 is 973496131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131694379 - 2⁹ = 131693867 is a prime.

It is not a weakly prime, because it can be changed into another prime (131694373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65847189 + 65847190.

It is an arithmetic number, because the mean of its divisors is an integer number (65847190).

Almost surely, 2^131694379 is an apocalyptic number.

131694379 is a deficient number, since it is larger than the sum of its proper divisors (1).

131694379 is an equidigital number, since it uses as much as digits as its factorization.

131694379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 131694379 is about 11475.8171386616. The cubic root of 131694379 is about 508.7710754389.

The spelling of 131694379 in words is "one hundred thirty-one million, six hundred ninety-four thousand, three hundred seventy-nine".