90589487 has 2 divisors, whose sum is σ = 90589488. Its totient is φ = 90589486.

The previous prime is 90589483. The next prime is 90589489. The reversal of 90589487 is 78498509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90589487 - 2² = 90589483 is a prime.

Together with 90589489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90589483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45294743 + 45294744.

It is an arithmetic number, because the mean of its divisors is an integer number (45294744).

Almost surely, 2^90589487 is an apocalyptic number.

90589487 is a deficient number, since it is larger than the sum of its proper divisors (1).

90589487 is an equidigital number, since it uses as much as digits as its factorization.

90589487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 90589487 is about 9517.8509654228. The cubic root of 90589487 is about 449.1167646877.

The spelling of 90589487 in words is "ninety million, five hundred eighty-nine thousand, four hundred eighty-seven".