274664989 has 2 divisors, whose sum is σ = 274664990. Its totient is φ = 274664988.

The previous prime is 274664983. The next prime is 274665029. The reversal of 274664989 is 989466472.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235100889 + 39564100 = 15333^2 + 6290^2 .

It is a cyclic number.

It is not a de Polignac number, because 274664989 - 2³ = 274664981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274664981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137332494 + 137332495.

It is an arithmetic number, because the mean of its divisors is an integer number (137332495).

Almost surely, 2^274664989 is an apocalyptic number.

It is an amenable number.

274664989 is a deficient number, since it is larger than the sum of its proper divisors (1).

274664989 is an equidigital number, since it uses as much as digits as its factorization.

274664989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The square root of 274664989 is about 16573.0199118929. The cubic root of 274664989 is about 650.0315479757.

It can be divided in two parts, 274664 and 989, that added together give a triangular number (275653 = T₇₄₂).

The spelling of 274664989 in words is "two hundred seventy-four million, six hundred sixty-four thousand, nine hundred eighty-nine".