90686499 has 4 divisors (see below), whose sum is σ = 120915336. Its totient is φ = 60457664.

The previous prime is 90686471. The next prime is 90686503. The reversal of 90686499 is 99468609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99468609 = 3 ⋅33156203.

It is a cyclic number.

It is not a de Polignac number, because 90686499 - 2⁸ = 90686243 is a prime.

It is a super-2 number, since 2×90686499² = 16448082201754002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90686419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15114414 + ... + 15114419.

It is an arithmetic number, because the mean of its divisors is an integer number (30228834).

Almost surely, 2^90686499 is an apocalyptic number.

90686499 is a deficient number, since it is larger than the sum of its proper divisors (30228837).

90686499 is a wasteful number, since it uses less digits than its factorization.

90686499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30228836.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 90686499 is about 9522.9459202497. The cubic root of 90686499 is about 449.2770267423.

The spelling of 90686499 in words is "ninety million, six hundred eighty-six thousand, four hundred ninety-nine".