997898039 has 2 divisors, whose sum is σ = 997898040. Its totient is φ = 997898038.

The previous prime is 997897997. The next prime is 997898047. The reversal of 997898039 is 930898799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997898039 - 2¹² = 997893943 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498949019 + 498949020.

It is an arithmetic number, because the mean of its divisors is an integer number (498949020).

Almost surely, 2^997898039 is an apocalyptic number.

997898039 is a deficient number, since it is larger than the sum of its proper divisors (1).

997898039 is an equidigital number, since it uses as much as digits as its factorization.

997898039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 62.

The square root of 997898039 is about 31589.5241971132. The cubic root of 997898039 is about 999.2988548437.

The spelling of 997898039 in words is "nine hundred ninety-seven million, eight hundred ninety-eight thousand, thirty-nine".