408700121 has 2 divisors, whose sum is σ = 408700122. Its totient is φ = 408700120.

The previous prime is 408700093. The next prime is 408700129. The reversal of 408700121 is 121007804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397444096 + 11256025 = 19936^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 408700121 - 2¹⁸ = 408437977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (408700129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204350060 + 204350061.

It is an arithmetic number, because the mean of its divisors is an integer number (204350061).

Almost surely, 2^408700121 is an apocalyptic number.

It is an amenable number.

408700121 is a deficient number, since it is larger than the sum of its proper divisors (1).

408700121 is an equidigital number, since it uses as much as digits as its factorization.

408700121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 408700121 is about 20216.3330255514. Note that the first 3 decimals coincide. The cubic root of 408700121 is about 742.1099515453.

Adding to 408700121 its reverse (121007804), we get a palindrome (529707925).

The spelling of 408700121 in words is "four hundred eight million, seven hundred thousand, one hundred twenty-one".