90598691 has 2 divisors, whose sum is σ = 90598692. Its totient is φ = 90598690.

The previous prime is 90598687. The next prime is 90598693. The reversal of 90598691 is 19689509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90598691 - 2² = 90598687 is a prime.

Together with 90598693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90598693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45299345 + 45299346.

It is an arithmetic number, because the mean of its divisors is an integer number (45299346).

Almost surely, 2^90598691 is an apocalyptic number.

90598691 is a deficient number, since it is larger than the sum of its proper divisors (1).

90598691 is an equidigital number, since it uses as much as digits as its factorization.

90598691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 90598691 is about 9518.3344656510. The cubic root of 90598691 is about 449.1319744391.

The spelling of 90598691 in words is "ninety million, five hundred ninety-eight thousand, six hundred ninety-one".