70357409 has 2 divisors, whose sum is σ = 70357410. Its totient is φ = 70357408.

The previous prime is 70357381. The next prime is 70357411. The reversal of 70357409 is 90475307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 14899600 = 7447^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 70357409 - 2⁸ = 70357153 is a prime.

Together with 70357411, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4137875 and since 70357409 and 4137875 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (70357459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35178704 + 35178705.

It is an arithmetic number, because the mean of its divisors is an integer number (35178705).

Almost surely, 2^70357409 is an apocalyptic number.

It is an amenable number.

70357409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70357409 is an equidigital number, since it uses as much as digits as its factorization.

70357409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 70357409 is about 8387.9323435517. The cubic root of 70357409 is about 412.8287607439.

The spelling of 70357409 in words is "seventy million, three hundred fifty-seven thousand, four hundred nine".