344478857 has 2 divisors, whose sum is σ = 344478858. Its totient is φ = 344478856.

The previous prime is 344478829. The next prime is 344478887. The reversal of 344478857 is 758874443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204032656 + 140446201 = 14284^2 + 11851^2 .

It is a cyclic number.

It is not a de Polignac number, because 344478857 - 2¹² = 344474761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (344478817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172239428 + 172239429.

It is an arithmetic number, because the mean of its divisors is an integer number (172239429).

Almost surely, 2^344478857 is an apocalyptic number.

It is an amenable number.

344478857 is a deficient number, since it is larger than the sum of its proper divisors (1).

344478857 is an equidigital number, since it uses as much as digits as its factorization.

344478857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3010560, while the sum is 50.

The square root of 344478857 is about 18560.1416212269. The cubic root of 344478857 is about 701.0045827853.

The spelling of 344478857 in words is "three hundred forty-four million, four hundred seventy-eight thousand, eight hundred fifty-seven".