70831985 has 16 divisors (see below), whose sum is σ = 98236800. Its totient is φ = 48022656.

The previous prime is 70831939. The next prime is 70831991. The reversal of 70831985 is 58913807.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 70831985 - 2⁸ = 70831729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8255 + ... + 14484.

It is an arithmetic number, because the mean of its divisors is an integer number (6139800).

Almost surely, 2^70831985 is an apocalyptic number.

It is an amenable number.

70831985 is a deficient number, since it is larger than the sum of its proper divisors (27404815).

70831985 is a wasteful number, since it uses less digits than its factorization.

70831985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22840.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 70831985 is about 8416.1740119843. The cubic root of 70831985 is about 413.7548880868.

The spelling of 70831985 in words is "seventy million, eight hundred thirty-one thousand, nine hundred eighty-five".