90855651 has 4 divisors (see below), whose sum is σ = 121140872. Its totient is φ = 60570432.

The previous prime is 90855641. The next prime is 90855659. The reversal of 90855651 is 15655809.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 90855651 - 2⁵ = 90855619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90855659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15142606 + ... + 15142611.

It is an arithmetic number, because the mean of its divisors is an integer number (30285218).

Almost surely, 2^90855651 is an apocalyptic number.

90855651 is a deficient number, since it is larger than the sum of its proper divisors (30285221).

90855651 is a wasteful number, since it uses less digits than its factorization.

90855651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30285220.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 90855651 is about 9531.8230680180. The cubic root of 90855651 is about 449.5561895985.

The spelling of 90855651 in words is "ninety million, eight hundred fifty-five thousand, six hundred fifty-one".