997158711 has 8 divisors (see below), whose sum is σ = 1330021744. Its totient is φ = 664534080.

The previous prime is 997158697. The next prime is 997158733. The reversal of 997158711 is 117851799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997158711 - 2¹⁷ = 997027639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997158751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49600 + ... + 66741.

It is an arithmetic number, because the mean of its divisors is an integer number (166252718).

Almost surely, 2^997158711 is an apocalyptic number.

997158711 is a deficient number, since it is larger than the sum of its proper divisors (332863033).

997158711 is a wasteful number, since it uses less digits than its factorization.

997158711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119201.

The product of its digits is 158760, while the sum is 48.

The square root of 997158711 is about 31577.8199215842. The cubic root of 997158711 is about 999.0520052566.

The spelling of 997158711 in words is "nine hundred ninety-seven million, one hundred fifty-eight thousand, seven hundred eleven".