90762989 has 4 divisors (see below), whose sum is σ = 90937056. Its totient is φ = 90588924.

The previous prime is 90762967. The next prime is 90763027. The reversal of 90762989 is 98926709.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98926709 = 7 ⋅14132387.

It is a cyclic number.

It is not a de Polignac number, because 90762989 - 2²⁰ = 89714413 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 (90761989) 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, 86249 + ... + 87294.

It is an arithmetic number, because the mean of its divisors is an integer number (22734264).

Almost surely, 2^90762989 is an apocalyptic number.

It is an amenable number.

90762989 is a deficient number, since it is larger than the sum of its proper divisors (174067).

90762989 is a wasteful number, since it uses less digits than its factorization.

90762989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174066.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 90762989 is about 9526.9611629312. The cubic root of 90762989 is about 449.4033062615.

The spelling of 90762989 in words is "ninety million, seven hundred sixty-two thousand, nine hundred eighty-nine".