409921297 has 2 divisors, whose sum is σ = 409921298. Its totient is φ = 409921296.

The previous prime is 409921229. The next prime is 409921307. The reversal of 409921297 is 792129904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409819536 + 101761 = 20244^2 + 319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409921297 is a prime.

It is not a weakly prime, because it can be changed into another prime (409921397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204960648 + 204960649.

It is an arithmetic number, because the mean of its divisors is an integer number (204960649).

Almost surely, 2^409921297 is an apocalyptic number.

It is an amenable number.

409921297 is a deficient number, since it is larger than the sum of its proper divisors (1).

409921297 is an equidigital number, since it uses as much as digits as its factorization.

409921297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 409921297 is about 20246.5132059819. The cubic root of 409921297 is about 742.8483460338.

The spelling of 409921297 in words is "four hundred nine million, nine hundred twenty-one thousand, two hundred ninety-seven".