406879772867 has 2 divisors, whose sum is σ = 406879772868. Its totient is φ = 406879772866.

The previous prime is 406879772863. The next prime is 406879772911. The reversal of 406879772867 is 768277978604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406879772867 - 2² = 406879772863 is a prime.

It is a super-2 number, since 2×406879772867² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 406879772867.

It is not a weakly prime, because it can be changed into another prime (406879772863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203439886433 + 203439886434.

It is an arithmetic number, because the mean of its divisors is an integer number (203439886434).

Almost surely, 2^406879772867 is an apocalyptic number.

406879772867 is a deficient number, since it is larger than the sum of its proper divisors (1).

406879772867 is an equidigital number, since it uses as much as digits as its factorization.

406879772867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 398297088, while the sum is 71.

The spelling of 406879772867 in words is "four hundred six billion, eight hundred seventy-nine million, seven hundred seventy-two thousand, eight hundred sixty-seven".