90919615 has 8 divisors (see below), whose sum is σ = 109195920. Its totient is φ = 72674112.

The previous prime is 90919613. The next prime is 90919627. The reversal of 90919615 is 51691909.

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 90919615 - 2¹ = 90919613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90919613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609 + ... + 13498.

It is an arithmetic number, because the mean of its divisors is an integer number (13649490).

Almost surely, 2^90919615 is an apocalyptic number.

90919615 is a deficient number, since it is larger than the sum of its proper divisors (18276305).

90919615 is a wasteful number, since it uses less digits than its factorization.

90919615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15401.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 90919615 is about 9535.1777644677. The cubic root of 90919615 is about 449.6616633777.

The spelling of 90919615 in words is "ninety million, nine hundred nineteen thousand, six hundred fifteen".