755431139 has 2 divisors, whose sum is σ = 755431140. Its totient is φ = 755431138.

The previous prime is 755431111. The next prime is 755431169. The reversal of 755431139 is 931134557.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-755431139 is a prime.

It is not a weakly prime, because it can be changed into another prime (755431169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377715569 + 377715570.

It is an arithmetic number, because the mean of its divisors is an integer number (377715570).

Almost surely, 2^755431139 is an apocalyptic number.

755431139 is a deficient number, since it is larger than the sum of its proper divisors (1).

755431139 is an equidigital number, since it uses as much as digits as its factorization.

755431139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 755431139 is about 27485.1075857454. The cubic root of 755431139 is about 910.7481425565.

The spelling of 755431139 in words is "seven hundred fifty-five million, four hundred thirty-one thousand, one hundred thirty-nine".