70810809 has 16 divisors (see below), whose sum is σ = 98442432. Its totient is φ = 45235008.

The previous prime is 70810807. The next prime is 70810847. The reversal of 70810809 is 90801807.

It is not a de Polignac number, because 70810809 - 2¹ = 70810807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70810809.

It is not an unprimeable number, because it can be changed into a prime (70810801) 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, 1659 + ... + 12015.

It is an arithmetic number, because the mean of its divisors is an integer number (6152652).

Almost surely, 2^70810809 is an apocalyptic number.

It is an amenable number.

70810809 is a deficient number, since it is larger than the sum of its proper divisors (27631623).

70810809 is a wasteful number, since it uses less digits than its factorization.

70810809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10456.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 70810809 is about 8414.9158641070. The cubic root of 70810809 is about 413.7136517875.

The spelling of 70810809 in words is "seventy million, eight hundred ten thousand, eight hundred nine".