997274287 has 2 divisors, whose sum is σ = 997274288. Its totient is φ = 997274286.

The previous prime is 997274279. The next prime is 997274323. The reversal of 997274287 is 782472799.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (782472799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997274287 - 2³ = 997274279 is a prime.

It is a super-2 number, since 2×997274287² = 1989112007022716738, which contains 22 as substring.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498637143 + 498637144.

It is an arithmetic number, because the mean of its divisors is an integer number (498637144).

Almost surely, 2^997274287 is an apocalyptic number.

997274287 is a deficient number, since it is larger than the sum of its proper divisors (1).

997274287 is an equidigital number, since it uses as much as digits as its factorization.

997274287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 55.

The square root of 997274287 is about 31579.6498872296. The cubic root of 997274287 is about 999.0906022464.

The spelling of 997274287 in words is "nine hundred ninety-seven million, two hundred seventy-four thousand, two hundred eighty-seven".