70813491 has 16 divisors (see below), whose sum is σ = 108734208. Its totient is φ = 40154400.

The previous prime is 70813487. The next prime is 70813507. The reversal of 70813491 is 19431807.

It is not a de Polignac number, because 70813491 - 2² = 70813487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70813451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10120 + ... + 15621.

It is an arithmetic number, because the mean of its divisors is an integer number (6795888).

Almost surely, 2^70813491 is an apocalyptic number.

70813491 is a deficient number, since it is larger than the sum of its proper divisors (37920717).

70813491 is a wasteful number, since it uses less digits than its factorization.

70813491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25882.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 70813491 is about 8415.0752224802. The cubic root of 70813491 is about 413.7188749355.

The spelling of 70813491 in words is "seventy million, eight hundred thirteen thousand, four hundred ninety-one".