503400431 has 2 divisors, whose sum is σ = 503400432. Its totient is φ = 503400430.

The previous prime is 503400407. The next prime is 503400467. The reversal of 503400431 is 134004305.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 503400431 - 2¹⁸ = 503138287 is a prime.

It is a super-2 number, since 2×503400431² = 506823987861971522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503400031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251700215 + 251700216.

It is an arithmetic number, because the mean of its divisors is an integer number (251700216).

Almost surely, 2^503400431 is an apocalyptic number.

503400431 is a deficient number, since it is larger than the sum of its proper divisors (1).

503400431 is an equidigital number, since it uses as much as digits as its factorization.

503400431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 503400431 is about 22436.5868839269. The cubic root of 503400431 is about 795.4957450170.

Adding to 503400431 its reverse (134004305), we get a palindrome (637404736).

The spelling of 503400431 in words is "five hundred three million, four hundred thousand, four hundred thirty-one".