90987051 has 8 divisors (see below), whose sum is σ = 123305104. Its totient is φ = 59663520.

The previous prime is 90987041. The next prime is 90987059. The reversal of 90987051 is 15078909.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90987051 - 2⁵ = 90987019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90987059) 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, 248416 + ... + 248781.

It is an arithmetic number, because the mean of its divisors is an integer number (15413138).

Almost surely, 2^90987051 is an apocalyptic number.

90987051 is a deficient number, since it is larger than the sum of its proper divisors (32318053).

90987051 is a wasteful number, since it uses less digits than its factorization.

90987051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497261.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 90987051 is about 9538.7132780056. The cubic root of 90987051 is about 449.7728087742.

The spelling of 90987051 in words is "ninety million, nine hundred eighty-seven thousand, fifty-one".