90009015 has 16 divisors (see below), whose sum is σ = 144309600. Its totient is φ = 47906432.

The previous prime is 90009001. The next prime is 90009037. The reversal of 90009015 is 51090009.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90009015 - 2⁵ = 90008983 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, 1741 + ... + 13529.

It is an arithmetic number, because the mean of its divisors is an integer number (9019350).

Almost surely, 2^90009015 is an apocalyptic number.

90009015 is a deficient number, since it is larger than the sum of its proper divisors (54300585).

90009015 is a wasteful number, since it uses less digits than its factorization.

90009015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12306.

The product of its (nonzero) digits is 405, while the sum is 24.

The square root of 90009015 is about 9487.3081008261. The cubic root of 90009015 is about 448.1554370687.

The spelling of 90009015 in words is "ninety million, nine thousand, fifteen".