409923079 has 2 divisors, whose sum is σ = 409923080. Its totient is φ = 409923078.

The previous prime is 409923071. The next prime is 409923083. The reversal of 409923079 is 970329904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409923079 - 2³ = 409923071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409923071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204961539 + 204961540.

It is an arithmetic number, because the mean of its divisors is an integer number (204961540).

Almost surely, 2^409923079 is an apocalyptic number.

409923079 is a deficient number, since it is larger than the sum of its proper divisors (1).

409923079 is an equidigital number, since it uses as much as digits as its factorization.

409923079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 409923079 is about 20246.5572135116. The cubic root of 409923079 is about 742.8494224631.

The spelling of 409923079 in words is "four hundred nine million, nine hundred twenty-three thousand, seventy-nine".