274665397 has 2 divisors, whose sum is σ = 274665398. Its totient is φ = 274665396.

The previous prime is 274665373. The next prime is 274665427. The reversal of 274665397 is 793566472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228886641 + 45778756 = 15129^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 274665397 - 2²³ = 266276789 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 274665397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274665317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137332698 + 137332699.

It is an arithmetic number, because the mean of its divisors is an integer number (137332699).

Almost surely, 2^274665397 is an apocalyptic number.

It is an amenable number.

274665397 is a deficient number, since it is larger than the sum of its proper divisors (1).

274665397 is an equidigital number, since it uses as much as digits as its factorization.

274665397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 49.

The square root of 274665397 is about 16573.0322210512. The cubic root of 274665397 is about 650.0318698378.

The spelling of 274665397 in words is "two hundred seventy-four million, six hundred sixty-five thousand, three hundred ninety-seven".