997364251 has 4 divisors (see below), whose sum is σ = 1074084592. Its totient is φ = 920643912.

The previous prime is 997364243. The next prime is 997364257. The reversal of 997364251 is 152463799.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 997364251 - 2³ = 997364243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997364257) 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, 38360151 + ... + 38360176.

It is an arithmetic number, because the mean of its divisors is an integer number (268521148).

Almost surely, 2^997364251 is an apocalyptic number.

997364251 is a deficient number, since it is larger than the sum of its proper divisors (76720341).

997364251 is a wasteful number, since it uses less digits than its factorization.

997364251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76720340.

The product of its digits is 408240, while the sum is 46.

The square root of 997364251 is about 31581.0742534196. The cubic root of 997364251 is about 999.1206439596.

The spelling of 997364251 in words is "nine hundred ninety-seven million, three hundred sixty-four thousand, two hundred fifty-one".