408407408447 has 2 divisors, whose sum is σ = 408407408448. Its totient is φ = 408407408446.

The previous prime is 408407408419. The next prime is 408407408467. The reversal of 408407408447 is 744804704804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408407408447 - 2¹² = 408407404351 is a prime.

It is a super-2 number, since 2×408407408447² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 408407408395 and 408407408404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408407408467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204203704223 + 204203704224.

It is an arithmetic number, because the mean of its divisors is an integer number (204203704224).

Almost surely, 2^408407408447 is an apocalyptic number.

408407408447 is a deficient number, since it is larger than the sum of its proper divisors (1).

408407408447 is an equidigital number, since it uses as much as digits as its factorization.

408407408447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3211264, while the sum is 50.

The spelling of 408407408447 in words is "four hundred eight billion, four hundred seven million, four hundred eight thousand, four hundred forty-seven".