431305379 has 2 divisors, whose sum is σ = 431305380. Its totient is φ = 431305378.

The previous prime is 431305349. The next prime is 431305403. The reversal of 431305379 is 973503134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431305379 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (431305309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215652689 + 215652690.

It is an arithmetic number, because the mean of its divisors is an integer number (215652690).

Almost surely, 2^431305379 is an apocalyptic number.

431305379 is a deficient number, since it is larger than the sum of its proper divisors (1).

431305379 is an equidigital number, since it uses as much as digits as its factorization.

431305379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 431305379 is about 20767.8929841234. The cubic root of 431305379 is about 755.5472423882.

The spelling of 431305379 in words is "four hundred thirty-one million, three hundred five thousand, three hundred seventy-nine".