90012851 has 4 divisors (see below), whose sum is σ = 90700104. Its totient is φ = 89325600.

The previous prime is 90012847. The next prime is 90012859. The reversal of 90012851 is 15821009.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 90012851 - 2² = 90012847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90012851.

It is not an unprimeable number, because it can be changed into a prime (90012859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343430 + ... + 343691.

It is an arithmetic number, because the mean of its divisors is an integer number (22675026).

Almost surely, 2^90012851 is an apocalyptic number.

90012851 is a deficient number, since it is larger than the sum of its proper divisors (687253).

90012851 is a wasteful number, since it uses less digits than its factorization.

90012851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687252.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 90012851 is about 9487.5102634991. The cubic root of 90012851 is about 448.1618034674.

The spelling of 90012851 in words is "ninety million, twelve thousand, eight hundred fifty-one".