431040139 has 2 divisors, whose sum is σ = 431040140. Its totient is φ = 431040138.

The previous prime is 431040133. The next prime is 431040209. The reversal of 431040139 is 931040134.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431040139 - 2³ = 431040131 is a prime.

It is not a weakly prime, because it can be changed into another prime (431040131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215520069 + 215520070.

It is an arithmetic number, because the mean of its divisors is an integer number (215520070).

Almost surely, 2^431040139 is an apocalyptic number.

431040139 is a deficient number, since it is larger than the sum of its proper divisors (1).

431040139 is an equidigital number, since it uses as much as digits as its factorization.

431040139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 431040139 is about 20761.5061833192. The cubic root of 431040139 is about 755.3923309228.

The spelling of 431040139 in words is "four hundred thirty-one million, forty thousand, one hundred thirty-nine".