89431 has 2 divisors, whose sum is σ = 89432. Its totient is φ = 89430.

The previous prime is 89417. The next prime is 89443. The reversal of 89431 is 13498.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89431 - 2⁵ = 89399 is a prime.

It is a super-2 number, since 2×89431² = 15995807522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 89396 and 89405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44715 + 44716.

It is an arithmetic number, because the mean of its divisors is an integer number (44716).

2⁸⁹⁴³¹ is an apocalyptic number.

89431 is a deficient number, since it is larger than the sum of its proper divisors (1).

89431 is an equidigital number, since it uses as much as digits as its factorization.

89431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 89431 is about 299.0501630162. The cubic root of 89431 is about 44.7194062814.

The spelling of 89431 in words is "eighty-nine thousand, four hundred thirty-one".