431634689 has 2 divisors, whose sum is σ = 431634690. Its totient is φ = 431634688.

The previous prime is 431634667. The next prime is 431634727. The reversal of 431634689 is 986436134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367105600 + 64529089 = 19160^2 + 8033^2 .

It is a cyclic number.

It is not a de Polignac number, because 431634689 - 2¹⁶ = 431569153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (431634089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215817344 + 215817345.

It is an arithmetic number, because the mean of its divisors is an integer number (215817345).

Almost surely, 2^431634689 is an apocalyptic number.

It is an amenable number.

431634689 is a deficient number, since it is larger than the sum of its proper divisors (1).

431634689 is an equidigital number, since it uses as much as digits as its factorization.

431634689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The square root of 431634689 is about 20775.8198153527. The cubic root of 431634689 is about 755.7394851144.

The spelling of 431634689 in words is "four hundred thirty-one million, six hundred thirty-four thousand, six hundred eighty-nine".