90615 has 16 divisors (see below), whose sum is σ = 165888. Its totient is φ = 41376.

The previous prime is 90599. The next prime is 90617. The reversal of 90615 is 51609.

It is not a de Polignac number, because 90615 - 2⁴ = 90599 is a prime.

It is a super-2 number, since 2×90615² = 16422156450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 90591 and 90600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327 + ... + 536.

It is an arithmetic number, because the mean of its divisors is an integer number (10368).

2⁹⁰⁶¹⁵ is an apocalyptic number.

90615 is a deficient number, since it is larger than the sum of its proper divisors (75273).

90615 is a wasteful number, since it uses less digits than its factorization.

90615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 90615 is about 301.0232549156. The cubic root of 90615 is about 44.9158922782.

The spelling of 90615 in words is "ninety thousand, six hundred fifteen".