870911983 has 2 divisors, whose sum is σ = 870911984. Its totient is φ = 870911982.

The previous prime is 870911971. The next prime is 870912017. The reversal of 870911983 is 389119078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 870911983 - 2⁹ = 870911471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870941983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435455991 + 435455992.

It is an arithmetic number, because the mean of its divisors is an integer number (435455992).

Almost surely, 2^870911983 is an apocalyptic number.

870911983 is a deficient number, since it is larger than the sum of its proper divisors (1).

870911983 is an equidigital number, since it uses as much as digits as its factorization.

870911983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 870911983 is about 29511.2179179376. The cubic root of 870911983 is about 954.9737236815.

The spelling of 870911983 in words is "eight hundred seventy million, nine hundred eleven thousand, nine hundred eighty-three".