406068557 has 4 divisors (see below), whose sum is σ = 406782780. Its totient is φ = 405354336.

The previous prime is 406068517. The next prime is 406068571. The reversal of 406068557 is 755860604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92813956 + 313254601 = 9634^2 + 17699^2 .

It is a cyclic number.

It is not a de Polignac number, because 406068557 - 2⁸ = 406068301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406068517) 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 in 3 ways as a sum of consecutive naturals, for example, 356258 + ... + 357395.

It is an arithmetic number, because the mean of its divisors is an integer number (101695695).

Almost surely, 2^406068557 is an apocalyptic number.

It is an amenable number.

406068557 is a deficient number, since it is larger than the sum of its proper divisors (714223).

406068557 is an equidigital number, since it uses as much as digits as its factorization.

406068557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714222.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 406068557 is about 20151.1428211901. The cubic root of 406068557 is about 740.5137393134.

The spelling of 406068557 in words is "four hundred six million, sixty-eight thousand, five hundred fifty-seven".