408872017 has 2 divisors, whose sum is σ = 408872018. Its totient is φ = 408872016.

The previous prime is 408872003. The next prime is 408872021. The reversal of 408872017 is 710278804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325405521 + 83466496 = 18039^2 + 9136^2 .

It is a cyclic number.

It is not a de Polignac number, because 408872017 - 2¹⁹ = 408347729 is a prime.

It is not a weakly prime, because it can be changed into another prime (408872047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204436008 + 204436009.

It is an arithmetic number, because the mean of its divisors is an integer number (204436009).

Almost surely, 2^408872017 is an apocalyptic number.

It is an amenable number.

408872017 is a deficient number, since it is larger than the sum of its proper divisors (1).

408872017 is an equidigital number, since it uses as much as digits as its factorization.

408872017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 408872017 is about 20220.5839925557. The cubic root of 408872017 is about 742.2139787978.

The spelling of 408872017 in words is "four hundred eight million, eight hundred seventy-two thousand, seventeen".