431428903 has 2 divisors, whose sum is σ = 431428904. Its totient is φ = 431428902.

The previous prime is 431428861. The next prime is 431428927. The reversal of 431428903 is 309824134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431428903 - 2⁹ = 431428391 is a prime.

It is a super-2 number, since 2×431428903² = 372261796687566818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431428973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215714451 + 215714452.

It is an arithmetic number, because the mean of its divisors is an integer number (215714452).

Almost surely, 2^431428903 is an apocalyptic number.

431428903 is a deficient number, since it is larger than the sum of its proper divisors (1).

431428903 is an equidigital number, since it uses as much as digits as its factorization.

431428903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 431428903 is about 20770.8666887061. The cubic root of 431428903 is about 755.6193639938.

The spelling of 431428903 in words is "four hundred thirty-one million, four hundred twenty-eight thousand, nine hundred three".