406855697 has 2 divisors, whose sum is σ = 406855698. Its totient is φ = 406855696.

The previous prime is 406855643. The next prime is 406855727. The reversal of 406855697 is 796558604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406264336 + 591361 = 20156^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 406855697 - 2⁶ = 406855633 is a prime.

It is not a weakly prime, because it can be changed into another prime (406855627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203427848 + 203427849.

It is an arithmetic number, because the mean of its divisors is an integer number (203427849).

Almost surely, 2^406855697 is an apocalyptic number.

It is an amenable number.

406855697 is a deficient number, since it is larger than the sum of its proper divisors (1).

406855697 is an equidigital number, since it uses as much as digits as its factorization.

406855697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 406855697 is about 20170.6642676933. The cubic root of 406855697 is about 740.9919112448.

The spelling of 406855697 in words is "four hundred six million, eight hundred fifty-five thousand, six hundred ninety-seven".