997274279 has 2 divisors, whose sum is σ = 997274280. Its totient is φ = 997274278.

The previous prime is 997274269. The next prime is 997274287. The reversal of 997274279 is 972472799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997274279 - 2⁴ = 997274263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997274219) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498637139 + 498637140.

It is an arithmetic number, because the mean of its divisors is an integer number (498637140).

Almost surely, 2^997274279 is an apocalyptic number.

997274279 is a deficient number, since it is larger than the sum of its proper divisors (1).

997274279 is an equidigital number, since it uses as much as digits as its factorization.

997274279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 56.

The square root of 997274279 is about 31579.6497605657. The cubic root of 997274279 is about 999.0905995749.

The spelling of 997274279 in words is "nine hundred ninety-seven million, two hundred seventy-four thousand, two hundred seventy-nine".