997894958 has 16 divisors (see below), whose sum is σ = 1540027824. Its totient is φ = 484600320.

The previous prime is 997894949. The next prime is 997894987. The reversal of 997894958 is 859498799.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31013 + ... + 54383.

It is an arithmetic number, because the mean of its divisors is an integer number (96251739).

Almost surely, 2^997894958 is an apocalyptic number.

997894958 is a deficient number, since it is larger than the sum of its proper divisors (542132866).

997894958 is a wasteful number, since it uses less digits than its factorization.

997894958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23987.

The product of its digits is 58786560, while the sum is 68.

The square root of 997894958 is about 31589.4754309089. The cubic root of 997894958 is about 999.2978264010.

The spelling of 997894958 in words is "nine hundred ninety-seven million, eight hundred ninety-four thousand, nine hundred fifty-eight".