897591983 has 2 divisors, whose sum is σ = 897591984. Its totient is φ = 897591982.

The previous prime is 897591979. The next prime is 897592009. The reversal of 897591983 is 389195798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897591983 - 2² = 897591979 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897591953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448795991 + 448795992.

It is an arithmetic number, because the mean of its divisors is an integer number (448795992).

Almost surely, 2^897591983 is an apocalyptic number.

897591983 is a deficient number, since it is larger than the sum of its proper divisors (1).

897591983 is an equidigital number, since it uses as much as digits as its factorization.

897591983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 59.

The square root of 897591983 is about 29959.8395022403. The cubic root of 897591983 is about 964.6275359266.

The spelling of 897591983 in words is "eight hundred ninety-seven million, five hundred ninety-one thousand, nine hundred eighty-three".