431132389 has 2 divisors, whose sum is σ = 431132390. Its totient is φ = 431132388.

The previous prime is 431132381. The next prime is 431132413. The reversal of 431132389 is 983231134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429732900 + 1399489 = 20730^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 431132389 - 2³ = 431132381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431132381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215566194 + 215566195.

It is an arithmetic number, because the mean of its divisors is an integer number (215566195).

Almost surely, 2^431132389 is an apocalyptic number.

It is an amenable number.

431132389 is a deficient number, since it is larger than the sum of its proper divisors (1).

431132389 is an equidigital number, since it uses as much as digits as its factorization.

431132389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 431132389 is about 20763.7277240865. The cubic root of 431132389 is about 755.4462160606.

The spelling of 431132389 in words is "four hundred thirty-one million, one hundred thirty-two thousand, three hundred eighty-nine".