90136689 has 8 divisors (see below), whose sum is σ = 120325920. Its totient is φ = 60019296.

The previous prime is 90136687. The next prime is 90136691. The reversal of 90136689 is 98663109.

It is an interprime number because it is at equal distance from previous prime (90136687) and next prime (90136691).

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

It is not a de Polignac number, because 90136689 - 2¹ = 90136687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90136689.

It is not an unprimeable number, because it can be changed into a prime (90136681) 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, 14959 + ... + 20100.

It is an arithmetic number, because the mean of its divisors is an integer number (15040740).

Almost surely, 2^90136689 is an apocalyptic number.

It is an amenable number.

90136689 is a deficient number, since it is larger than the sum of its proper divisors (30189231).

90136689 is a wasteful number, since it uses less digits than its factorization.

90136689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35919.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 90136689 is about 9494.0343900789. The cubic root of 90136689 is about 448.3672335015.

The spelling of 90136689 in words is "ninety million, one hundred thirty-six thousand, six hundred eighty-nine".