90689607 has 6 divisors (see below), whose sum is σ = 130996112. Its totient is φ = 60459732.

The previous prime is 90689569. The next prime is 90689609. The reversal of 90689607 is 70698609.

It is a de Polignac number, because none of the positive numbers 2^k-90689607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90689609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5038303 + ... + 5038320.

Almost surely, 2^90689607 is an apocalyptic number.

90689607 is a deficient number, since it is larger than the sum of its proper divisors (40306505).

90689607 is a wasteful number, since it uses less digits than its factorization.

90689607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076629 (or 10076626 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 90689607 is about 9523.1091036489. The cubic root of 90689607 is about 449.2821592117.

The spelling of 90689607 in words is "ninety million, six hundred eighty-nine thousand, six hundred seven".