70400357 has 2 divisors, whose sum is σ = 70400358. Its totient is φ = 70400356.

The previous prime is 70400293. The next prime is 70400359. The reversal of 70400357 is 75300407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63266116 + 7134241 = 7954^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 70400357 - 2⁶ = 70400293 is a prime.

Together with 70400359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70400359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35200178 + 35200179.

It is an arithmetic number, because the mean of its divisors is an integer number (35200179).

Almost surely, 2^70400357 is an apocalyptic number.

It is an amenable number.

70400357 is a deficient number, since it is larger than the sum of its proper divisors (1).

70400357 is an equidigital number, since it uses as much as digits as its factorization.

70400357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 70400357 is about 8390.4920594683. The cubic root of 70400357 is about 412.9127441435.

The spelling of 70400357 in words is "seventy million, four hundred thousand, three hundred fifty-seven".