997891795 has 16 divisors (see below), whose sum is σ = 1205856000. Its totient is φ = 792741600.

The previous prime is 997891793. The next prime is 997891831. The reversal of 997891795 is 597198799.

It is not a de Polignac number, because 997891795 - 2¹ = 997891793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997891793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664956 + ... + 666454.

It is an arithmetic number, because the mean of its divisors is an integer number (75366000).

Almost surely, 2^997891795 is an apocalyptic number.

997891795 is a deficient number, since it is larger than the sum of its proper divisors (207964205).

997891795 is a wasteful number, since it uses less digits than its factorization.

997891795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346.

The product of its digits is 12859560, while the sum is 64.

The square root of 997891795 is about 31589.4253667268. The cubic root of 997891795 is about 999.2967705843.

The spelling of 997891795 in words is "nine hundred ninety-seven million, eight hundred ninety-one thousand, seven hundred ninety-five".