409120879 has 2 divisors, whose sum is σ = 409120880. Its totient is φ = 409120878.

The previous prime is 409120847. The next prime is 409120889. The reversal of 409120879 is 978021904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409120879 - 2⁵ = 409120847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409120819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204560439 + 204560440.

It is an arithmetic number, because the mean of its divisors is an integer number (204560440).

Almost surely, 2^409120879 is an apocalyptic number.

409120879 is a deficient number, since it is larger than the sum of its proper divisors (1).

409120879 is an equidigital number, since it uses as much as digits as its factorization.

409120879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 409120879 is about 20226.7367363102. The cubic root of 409120879 is about 742.3645323415.

The spelling of 409120879 in words is "four hundred nine million, one hundred twenty thousand, eight hundred seventy-nine".