70809825 has 24 divisors (see below), whose sum is σ = 117367488. Its totient is φ = 37670080.

The previous prime is 70809803. The next prime is 70809839. The reversal of 70809825 is 52890807.

It is not a de Polignac number, because 70809825 - 2⁸ = 70809569 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36787 + ... + 38663.

It is an arithmetic number, because the mean of its divisors is an integer number (4890312).

Almost surely, 2^70809825 is an apocalyptic number.

70809825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70809825 is a deficient number, since it is larger than the sum of its proper divisors (46557663).

70809825 is a wasteful number, since it uses less digits than its factorization.

70809825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 70809825 is about 8414.8573962961. The cubic root of 70809825 is about 413.7117354317.

The spelling of 70809825 in words is "seventy million, eight hundred nine thousand, eight hundred twenty-five".