997456311 has 24 divisors (see below), whose sum is σ = 1464334560. Its totient is φ = 654183936.

The previous prime is 997456303. The next prime is 997456331. The reversal of 997456311 is 113654799.

997456311 is a `hidden beast` number, since 9 + 9 + 7 + 4 + 5 + 631 + 1 = 666.

It is not a de Polignac number, because 997456311 - 2³ = 997456303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997456331) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135750 + ... + 142908.

It is an arithmetic number, because the mean of its divisors is an integer number (61013940).

Almost surely, 2^997456311 is an apocalyptic number.

997456311 is a deficient number, since it is larger than the sum of its proper divisors (466878249).

997456311 is a wasteful number, since it uses less digits than its factorization.

997456311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7415 (or 7412 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 997456311 is about 31582.5317382885. The cubic root of 997456311 is about 999.1513837208.

The spelling of 997456311 in words is "nine hundred ninety-seven million, four hundred fifty-six thousand, three hundred eleven".