84089431 has 2 divisors, whose sum is σ = 84089432. Its totient is φ = 84089430.

The previous prime is 84089407. The next prime is 84089441. The reversal of 84089431 is 13498048.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84089431 is a prime.

It is a super-2 number, since 2×84089431² = 14142064811807522, 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 (84089441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42044715 + 42044716.

It is an arithmetic number, because the mean of its divisors is an integer number (42044716).

Almost surely, 2^84089431 is an apocalyptic number.

84089431 is a deficient number, since it is larger than the sum of its proper divisors (1).

84089431 is an equidigital number, since it uses as much as digits as its factorization.

84089431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 84089431 is about 9170.0289530623. The cubic root of 84089431 is about 438.1072813945.

The spelling of 84089431 in words is "eighty-four million, eighty-nine thousand, four hundred thirty-one".