70399157 has 2 divisors, whose sum is σ = 70399158. Its totient is φ = 70399156.

The previous prime is 70399139. The next prime is 70399169. The reversal of 70399157 is 75199307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68046001 + 2353156 = 8249^2 + 1534^2 .

It is a cyclic number.

It is not a de Polignac number, because 70399157 - 2²⁰ = 69350581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70399117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35199578 + 35199579.

It is an arithmetic number, because the mean of its divisors is an integer number (35199579).

Almost surely, 2^70399157 is an apocalyptic number.

It is an amenable number.

70399157 is a deficient number, since it is larger than the sum of its proper divisors (1).

70399157 is an equidigital number, since it uses as much as digits as its factorization.

70399157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 70399157 is about 8390.4205496507. The cubic root of 70399157 is about 412.9103980469.

The spelling of 70399157 in words is "seventy million, three hundred ninety-nine thousand, one hundred fifty-seven".