997258311 has 40 divisors (see below), whose sum is σ = 1776597504. Its totient is φ = 545078160.

The previous prime is 997258307. The next prime is 997258319. The reversal of 997258311 is 113852799.

It is not a de Polignac number, because 997258311 - 2² = 997258307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997258319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25195 + ... + 51276.

Almost surely, 2^997258311 is an apocalyptic number.

997258311 is a deficient number, since it is larger than the sum of its proper divisors (779339193).

997258311 is a wasteful number, since it uses less digits than its factorization.

997258311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76513 (or 76504 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 997258311 is about 31579.3969385104. The cubic root of 997258311 is about 999.0852671857.

The spelling of 997258311 in words is "nine hundred ninety-seven million, two hundred fifty-eight thousand, three hundred eleven".