997744311 has 10 divisors (see below), whose sum is σ = 1490457672. Its totient is φ = 665162820.

The previous prime is 997744309. The next prime is 997744337. The reversal of 997744311 is 113447799.

It is not a de Polignac number, because 997744311 - 2¹ = 997744309 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997744381) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6158835 + ... + 6158996.

Almost surely, 2^997744311 is an apocalyptic number.

997744311 is a deficient number, since it is larger than the sum of its proper divisors (492713361).

997744311 is a wasteful number, since it uses less digits than its factorization.

997744311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12317843 (or 12317834 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 997744311 is about 31587.0908916918. The cubic root of 997744311 is about 999.2475376090.

The spelling of 997744311 in words is "nine hundred ninety-seven million, seven hundred forty-four thousand, three hundred eleven".