997056839 has 8 divisors (see below), whose sum is σ = 1012843440. Its totient is φ = 981360256.

The previous prime is 997056821. The next prime is 997056883. The reversal of 997056839 is 938650799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997056839 - 2²⁴ = 980279623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997056139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2 + ... + 44655.

It is an arithmetic number, because the mean of its divisors is an integer number (126605430).

Almost surely, 2^997056839 is an apocalyptic number.

997056839 is a deficient number, since it is larger than the sum of its proper divisors (15786601).

997056839 is a wasteful number, since it uses less digits than its factorization.

997056839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45009.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The square root of 997056839 is about 31576.2068494618. The cubic root of 997056839 is about 999.0179822902.

The spelling of 997056839 in words is "nine hundred ninety-seven million, fifty-six thousand, eight hundred thirty-nine".