70131913 has 2 divisors, whose sum is σ = 70131914. Its totient is φ = 70131912.

The previous prime is 70131857. The next prime is 70131923. The reversal of 70131913 is 31913107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50168889 + 19963024 = 7083^2 + 4468^2 .

It is a cyclic number.

It is not a de Polignac number, because 70131913 - 2²⁵ = 36577481 is a prime.

It is not a weakly prime, because it can be changed into another prime (70131923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35065956 + 35065957.

It is an arithmetic number, because the mean of its divisors is an integer number (35065957).

Almost surely, 2^70131913 is an apocalyptic number.

It is an amenable number.

70131913 is a deficient number, since it is larger than the sum of its proper divisors (1).

70131913 is an equidigital number, since it uses as much as digits as its factorization.

70131913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 70131913 is about 8374.4798644453. The cubic root of 70131913 is about 412.3872490125.

The spelling of 70131913 in words is "seventy million, one hundred thirty-one thousand, nine hundred thirteen".