90689507 has 8 divisors (see below), whose sum is σ = 92488032. Its totient is φ = 88905600.

The previous prime is 90689449. The next prime is 90689531. The reversal of 90689507 is 70598609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90689507 - 2⁸ = 90689251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90689707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9323 + ... + 16379.

It is an arithmetic number, because the mean of its divisors is an integer number (11561004).

Almost surely, 2^90689507 is an apocalyptic number.

90689507 is a deficient number, since it is larger than the sum of its proper divisors (1798525).

90689507 is a wasteful number, since it uses less digits than its factorization.

90689507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 90689507 is about 9523.1038532613. The cubic root of 90689507 is about 449.2819940762.

The spelling of 90689507 in words is "ninety million, six hundred eighty-nine thousand, five hundred seven".