406479881 has 2 divisors, whose sum is σ = 406479882. Its totient is φ = 406479880.

The previous prime is 406479859. The next prime is 406479889. The reversal of 406479881 is 188974604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320732281 + 85747600 = 17909^2 + 9260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406479881 is a prime.

It is a super-2 number, since 2×406479881² = 330451787315548322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406479889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203239940 + 203239941.

It is an arithmetic number, because the mean of its divisors is an integer number (203239941).

Almost surely, 2^406479881 is an apocalyptic number.

It is an amenable number.

406479881 is a deficient number, since it is larger than the sum of its proper divisors (1).

406479881 is an equidigital number, since it uses as much as digits as its factorization.

406479881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 406479881 is about 20161.3462100129. The cubic root of 406479881 is about 740.7636874905.

The spelling of 406479881 in words is "four hundred six million, four hundred seventy-nine thousand, eight hundred eighty-one".