406081139 has 4 divisors (see below), whose sum is σ = 406709424. Its totient is φ = 405452856.

The previous prime is 406081127. The next prime is 406081199. The reversal of 406081139 is 931180604.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 406081139 - 2²⁴ = 389303923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406081199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313172 + ... + 314465.

It is an arithmetic number, because the mean of its divisors is an integer number (101677356).

Almost surely, 2^406081139 is an apocalyptic number.

406081139 is a deficient number, since it is larger than the sum of its proper divisors (628285).

406081139 is an equidigital number, since it uses as much as digits as its factorization.

406081139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628284.

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

The square root of 406081139 is about 20151.4550095024. The cubic root of 406081139 is about 740.5213874863.

The spelling of 406081139 in words is "four hundred six million, eighty-one thousand, one hundred thirty-nine".