90909015 has 16 divisors (see below), whose sum is σ = 153110400. Its totient is φ = 45932832.

The previous prime is 90908959. The next prime is 90909031. The reversal of 90909015 is 51090909.

It is not a de Polignac number, because 90909015 - 2¹⁴ = 90892631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159205 + ... + 159774.

It is an arithmetic number, because the mean of its divisors is an integer number (9569400).

Almost surely, 2^90909015 is an apocalyptic number.

90909015 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

90909015 is a deficient number, since it is larger than the sum of its proper divisors (62201385).

90909015 is a wasteful number, since it uses less digits than its factorization.

90909015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319006.

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 90909015 is about 9534.6219117488. The cubic root of 90909015 is about 449.6441878716.

The spelling of 90909015 in words is "ninety million, nine hundred nine thousand, fifteen".