989475983 has 2 divisors, whose sum is σ = 989475984. Its totient is φ = 989475982.

The previous prime is 989475857. The next prime is 989476009. The reversal of 989475983 is 389574989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989475983 - 2⁸ = 989475727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989472983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494737991 + 494737992.

It is an arithmetic number, because the mean of its divisors is an integer number (494737992).

Almost surely, 2^989475983 is an apocalyptic number.

989475983 is a deficient number, since it is larger than the sum of its proper divisors (1).

989475983 is an equidigital number, since it uses as much as digits as its factorization.

989475983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 62.

The square root of 989475983 is about 31455.9371661377. The cubic root of 989475983 is about 996.4796157710.

The spelling of 989475983 in words is "nine hundred eighty-nine million, four hundred seventy-five thousand, nine hundred eighty-three".