406809131 has 2 divisors, whose sum is σ = 406809132. Its totient is φ = 406809130.

The previous prime is 406809127. The next prime is 406809229. The reversal of 406809131 is 131908604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406809131 - 2² = 406809127 is a prime.

It is a super-2 number, since 2×406809131² = 330987338129950322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (406809331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203404565 + 203404566.

It is an arithmetic number, because the mean of its divisors is an integer number (203404566).

Almost surely, 2^406809131 is an apocalyptic number.

406809131 is a deficient number, since it is larger than the sum of its proper divisors (1).

406809131 is an equidigital number, since it uses as much as digits as its factorization.

406809131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 406809131 is about 20169.5099345522. The cubic root of 406809131 is about 740.9636404958.

The spelling of 406809131 in words is "four hundred six million, eight hundred nine thousand, one hundred thirty-one".