403430431 has 2 divisors, whose sum is σ = 403430432. Its totient is φ = 403430430.

The previous prime is 403430411. The next prime is 403430471. The reversal of 403430431 is 134034304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 403430431 - 2⁹ = 403429919 is a prime.

It is a super-2 number, since 2×403430431² = 325512225313691522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403430411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201715215 + 201715216.

It is an arithmetic number, because the mean of its divisors is an integer number (201715216).

Almost surely, 2^403430431 is an apocalyptic number.

403430431 is a deficient number, since it is larger than the sum of its proper divisors (1).

403430431 is an equidigital number, since it uses as much as digits as its factorization.

403430431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 403430431 is about 20085.5776864894. The cubic root of 403430431 is about 738.9066096248.

Adding to 403430431 its reverse (134034304), we get a palindrome (537464735).

The spelling of 403430431 in words is "four hundred three million, four hundred thirty thousand, four hundred thirty-one".