376009409 has 2 divisors, whose sum is σ = 376009410. Its totient is φ = 376009408.

The previous prime is 376009399. The next prime is 376009423. The reversal of 376009409 is 904900673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278789809 + 97219600 = 16697^2 + 9860^2 .

It is a cyclic number.

It is not a de Polignac number, because 376009409 - 2⁴ = 376009393 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (376009709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188004704 + 188004705.

It is an arithmetic number, because the mean of its divisors is an integer number (188004705).

Almost surely, 2^376009409 is an apocalyptic number.

It is an amenable number.

376009409 is a deficient number, since it is larger than the sum of its proper divisors (1).

376009409 is an equidigital number, since it uses as much as digits as its factorization.

376009409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 376009409 is about 19390.9620442102. The cubic root of 376009409 is about 721.7712364464.

The spelling of 376009409 in words is "three hundred seventy-six million, nine thousand, four hundred nine".