785431 has 2 divisors, whose sum is σ = 785432. Its totient is φ = 785430.

The previous prime is 785423. The next prime is 785459. The reversal of 785431 is 134587.

It is an a-pointer prime, because the next prime (785459) can be obtained adding 785431 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (134587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 785431 - 2³ = 785423 is a prime.

It is a super-2 number, since 2×785431² = 1233803711522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 785431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392715 + 392716.

It is an arithmetic number, because the mean of its divisors is an integer number (392716).

2⁷⁸⁵⁴³¹ is an apocalyptic number.

785431 is a deficient number, since it is larger than the sum of its proper divisors (1).

785431 is an equidigital number, since it uses as much as digits as its factorization.

785431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 785431 is about 886.2454513282. The cubic root of 785431 is about 92.2647932250.

The spelling of 785431 in words is "seven hundred eighty-five thousand, four hundred thirty-one".