90577891 has 8 divisors (see below), whose sum is σ = 91653120. Its totient is φ = 89506632.

The previous prime is 90577871. The next prime is 90577913. The reversal of 90577891 is 19877509.

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 90577891 - 2⁷ = 90577763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90577871) 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, 88380 + ... + 89398.

It is an arithmetic number, because the mean of its divisors is an integer number (11456640).

Almost surely, 2^90577891 is an apocalyptic number.

90577891 is a deficient number, since it is larger than the sum of its proper divisors (1075229).

90577891 is a wasteful number, since it uses less digits than its factorization.

90577891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 90577891 is about 9517.2417748001. The cubic root of 90577891 is about 449.0976006529.

The spelling of 90577891 in words is "ninety million, five hundred seventy-seven thousand, eight hundred ninety-one".