90589687 has 2 divisors, whose sum is σ = 90589688. Its totient is φ = 90589686.

The previous prime is 90589679. The next prime is 90589693. The reversal of 90589687 is 78698509.

It is a strong prime.

It is an emirp because it is prime and its reverse (78698509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90589687 - 2³ = 90589679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90589607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45294843 + 45294844.

It is an arithmetic number, because the mean of its divisors is an integer number (45294844).

Almost surely, 2^90589687 is an apocalyptic number.

90589687 is a deficient number, since it is larger than the sum of its proper divisors (1).

90589687 is an equidigital number, since it uses as much as digits as its factorization.

90589687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 90589687 is about 9517.8614719904. The cubic root of 90589687 is about 449.1170952017.

The spelling of 90589687 in words is "ninety million, five hundred eighty-nine thousand, six hundred eighty-seven".