85884431 has 2 divisors, whose sum is σ = 85884432. Its totient is φ = 85884430.

The previous prime is 85884367. The next prime is 85884439. The reversal of 85884431 is 13448858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85884431 - 2⁶ = 85884367 is a prime.

It is a super-2 number, since 2×85884431² = 14752270976387522, 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 (85884439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42942215 + 42942216.

It is an arithmetic number, because the mean of its divisors is an integer number (42942216).

Almost surely, 2^85884431 is an apocalyptic number.

85884431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85884431 is an equidigital number, since it uses as much as digits as its factorization.

85884431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 41.

The square root of 85884431 is about 9267.3853378394. The cubic root of 85884431 is about 441.2026858507.

The spelling of 85884431 in words is "eighty-five million, eight hundred eighty-four thousand, four hundred thirty-one".