90987013 has 8 divisors (see below), whose sum is σ = 98637056. Its totient is φ = 83430000.

The previous prime is 90986927. The next prime is 90987019. The reversal of 90987013 is 31078909.

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 90987013 - 2²¹ = 88889861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90987019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21213 + ... + 25138.

It is an arithmetic number, because the mean of its divisors is an integer number (12329632).

Almost surely, 2^90987013 is an apocalyptic number.

It is an amenable number.

90987013 is a deficient number, since it is larger than the sum of its proper divisors (7650043).

90987013 is a wasteful number, since it uses less digits than its factorization.

90987013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46515.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 90987013 is about 9538.7112861225. The cubic root of 90987013 is about 449.7727461595.

The spelling of 90987013 in words is "ninety million, nine hundred eighty-seven thousand, thirteen".