428813431 has 2 divisors, whose sum is σ = 428813432. Its totient is φ = 428813430.

The previous prime is 428813381. The next prime is 428813509. The reversal of 428813431 is 134318824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428813431 - 2²⁵ = 395258999 is a prime.

It is a super-2 number, since 2×428813431² = 367761917211983522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428813131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214406715 + 214406716.

It is an arithmetic number, because the mean of its divisors is an integer number (214406716).

Almost surely, 2^428813431 is an apocalyptic number.

428813431 is a deficient number, since it is larger than the sum of its proper divisors (1).

428813431 is an equidigital number, since it uses as much as digits as its factorization.

428813431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 428813431 is about 20707.8108693314. The cubic root of 428813431 is about 754.0893255134.

The spelling of 428813431 in words is "four hundred twenty-eight million, eight hundred thirteen thousand, four hundred thirty-one".