137431699 has 2 divisors, whose sum is σ = 137431700. Its totient is φ = 137431698.

The previous prime is 137431681. The next prime is 137431729. The reversal of 137431699 is 996134731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137431699 - 2⁷ = 137431571 is a prime.

It is not a weakly prime, because it can be changed into another prime (137431499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68715849 + 68715850.

It is an arithmetic number, because the mean of its divisors is an integer number (68715850).

Almost surely, 2^137431699 is an apocalyptic number.

137431699 is a deficient number, since it is larger than the sum of its proper divisors (1).

137431699 is an equidigital number, since it uses as much as digits as its factorization.

137431699 is an evil number, because the sum of its binary digits is even.

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

The square root of 137431699 is about 11723.1266733752. The cubic root of 137431699 is about 516.0545820414.

The spelling of 137431699 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, six hundred ninety-nine".