85830431 has 2 divisors, whose sum is σ = 85830432. Its totient is φ = 85830430.

The previous prime is 85830403. The next prime is 85830439. The reversal of 85830431 is 13403858.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85830431 is a prime.

It is a super-2 number, since 2×85830431² = 14733725771291522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85830439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42915215 + 42915216.

It is an arithmetic number, because the mean of its divisors is an integer number (42915216).

Almost surely, 2^85830431 is an apocalyptic number.

85830431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85830431 is an equidigital number, since it uses as much as digits as its factorization.

85830431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 85830431 is about 9264.4714366228. The cubic root of 85830431 is about 441.1101974535.

The spelling of 85830431 in words is "eighty-five million, eight hundred thirty thousand, four hundred thirty-one".