70156397 has 4 divisors (see below), whose sum is σ = 70224960. Its totient is φ = 70087836.

The previous prime is 70156381. The next prime is 70156439. The reversal of 70156397 is 79365107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70156397 - 2⁴ = 70156381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70156397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70156327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32723 + ... + 34800.

It is an arithmetic number, because the mean of its divisors is an integer number (17556240).

Almost surely, 2^70156397 is an apocalyptic number.

It is an amenable number.

70156397 is a deficient number, since it is larger than the sum of its proper divisors (68563).

70156397 is a wasteful number, since it uses less digits than its factorization.

70156397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68562.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 70156397 is about 8375.9415590129. The cubic root of 70156397 is about 412.4352334189.

The spelling of 70156397 in words is "seventy million, one hundred fifty-six thousand, three hundred ninety-seven".