406264139 has 2 divisors, whose sum is σ = 406264140. Its totient is φ = 406264138.

The previous prime is 406264097. The next prime is 406264153. The reversal of 406264139 is 931462604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406264139 - 2⁸ = 406263883 is a prime.

It is a super-2 number, since 2×406264139² = 330101101274822642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 406264099 and 406264108.

It is not a weakly prime, because it can be changed into another prime (406264189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203132069 + 203132070.

It is an arithmetic number, because the mean of its divisors is an integer number (203132070).

Almost surely, 2^406264139 is an apocalyptic number.

406264139 is a deficient number, since it is larger than the sum of its proper divisors (1).

406264139 is an equidigital number, since it uses as much as digits as its factorization.

406264139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 406264139 is about 20155.9951131171. The cubic root of 406264139 is about 740.6326091523.

The spelling of 406264139 in words is "four hundred six million, two hundred sixty-four thousand, one hundred thirty-nine".