997363331 has 4 divisors (see below), whose sum is σ = 1031755200. Its totient is φ = 962971464.

The previous prime is 997363319. The next prime is 997363337. The reversal of 997363331 is 133363799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133363799 = 37 ⋅3604427.

It is a cyclic number.

It is not a de Polignac number, because 997363331 - 2²² = 993169027 is a prime.

It is a super-2 number, since 2×997363331² = 1989467228046831122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997363337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17195891 + ... + 17195948.

It is an arithmetic number, because the mean of its divisors is an integer number (257938800).

Almost surely, 2^997363331 is an apocalyptic number.

997363331 is a deficient number, since it is larger than the sum of its proper divisors (34391869).

997363331 is a wasteful number, since it uses less digits than its factorization.

997363331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34391868.

The product of its digits is 275562, while the sum is 44.

The square root of 997363331 is about 31581.0596877306. The cubic root of 997363331 is about 999.1203367528.

The spelling of 997363331 in words is "nine hundred ninety-seven million, three hundred sixty-three thousand, three hundred thirty-one".