997395919 has 6 divisors (see below), whose sum is σ = 1080020616. Its totient is φ = 920673000.

The previous prime is 997395913. The next prime is 997395929. The reversal of 997395919 is 919593799.

It is not a de Polignac number, because 997395919 - 2³ = 997395911 is a prime.

It is a super-2 number, since 2×997395919² = 1989597238475709122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997395911) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2950707 + ... + 2951044.

It is an arithmetic number, because the mean of its divisors is an integer number (180003436).

Almost surely, 2^997395919 is an apocalyptic number.

997395919 is a deficient number, since it is larger than the sum of its proper divisors (82624697).

997395919 is a wasteful number, since it uses less digits than its factorization.

997395919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901777 (or 5901764 counting only the distinct ones).

The product of its digits is 6200145, while the sum is 61.

The square root of 997395919 is about 31581.5756256714. The cubic root of 997395919 is about 999.1312184372.

The spelling of 997395919 in words is "nine hundred ninety-seven million, three hundred ninety-five thousand, nine hundred nineteen".