90589439 has 2 divisors, whose sum is σ = 90589440. Its totient is φ = 90589438.

The previous prime is 90589381. The next prime is 90589441. The reversal of 90589439 is 93498509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90589439 - 2⁸ = 90589183 is a prime.

Together with 90589441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90589393 and 90589402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90589489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45294719 + 45294720.

It is an arithmetic number, because the mean of its divisors is an integer number (45294720).

Almost surely, 2^90589439 is an apocalyptic number.

90589439 is a deficient number, since it is larger than the sum of its proper divisors (1).

90589439 is an equidigital number, since it uses as much as digits as its factorization.

90589439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 90589439 is about 9517.8484438449. The cubic root of 90589439 is about 449.1166853643.

The spelling of 90589439 in words is "ninety million, five hundred eighty-nine thousand, four hundred thirty-nine".