70920891 has 24 divisors (see below), whose sum is σ = 108725760. Its totient is φ = 44450736.

The previous prime is 70920859. The next prime is 70920893. The reversal of 70920891 is 19802907.

It is a happy number.

It is not a de Polignac number, because 70920891 - 2⁵ = 70920859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70920893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9310 + ... + 15116.

It is an arithmetic number, because the mean of its divisors is an integer number (4530240).

Almost surely, 2^70920891 is an apocalyptic number.

70920891 is a deficient number, since it is larger than the sum of its proper divisors (37804869).

70920891 is a wasteful number, since it uses less digits than its factorization.

70920891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895 (or 5892 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 70920891 is about 8421.4542093394. The cubic root of 70920891 is about 413.9279262617.

The spelling of 70920891 in words is "seventy million, nine hundred twenty thousand, eight hundred ninety-one".