997705895 has 24 divisors (see below), whose sum is σ = 1236547104. Its totient is φ = 772716096.

The previous prime is 997705883. The next prime is 997705901. The reversal of 997705895 is 598507799.

It is not a de Polignac number, because 997705895 - 2⁶ = 997705831 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 1137197 + ... + 1138073.

It is an arithmetic number, because the mean of its divisors is an integer number (51522796).

Almost surely, 2^997705895 is an apocalyptic number.

997705895 is a deficient number, since it is larger than the sum of its proper divisors (238841209).

997705895 is a wasteful number, since it uses less digits than its factorization.

997705895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 59.

The square root of 997705895 is about 31586.4827893199. The cubic root of 997705895 is about 999.2347128183.

The spelling of 997705895 in words is "nine hundred ninety-seven million, seven hundred five thousand, eight hundred ninety-five".