70845857 has 4 divisors (see below), whose sum is σ = 71742720. Its totient is φ = 69948996.

The previous prime is 70845839. The next prime is 70845871. The reversal of 70845857 is 75854807.

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 70845857 - 2⁸ = 70845601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70845557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448313 + ... + 448470.

It is an arithmetic number, because the mean of its divisors is an integer number (17935680).

Almost surely, 2^70845857 is an apocalyptic number.

It is an amenable number.

70845857 is a deficient number, since it is larger than the sum of its proper divisors (896863).

70845857 is an equidigital number, since it uses as much as digits as its factorization.

70845857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896862.

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 70845857 is about 8416.9980990850. The cubic root of 70845857 is about 413.7818967569.

The spelling of 70845857 in words is "seventy million, eight hundred forty-five thousand, eight hundred fifty-seven".