90788789 has 16 divisors (see below), whose sum is σ = 118315008. Its totient is φ = 67606272.

The previous prime is 90788779. The next prime is 90788809. The reversal of 90788789 is 98788709.

It is a cyclic number.

It is not a de Polignac number, because 90788789 - 2¹² = 90784693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90788749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27797 + ... + 30890.

It is an arithmetic number, because the mean of its divisors is an integer number (7394688).

Almost surely, 2^90788789 is an apocalyptic number.

It is an amenable number.

90788789 is a deficient number, since it is larger than the sum of its proper divisors (27526219).

90788789 is a wasteful number, since it uses less digits than its factorization.

90788789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58724.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 90788789 is about 9528.3151186346. The cubic root of 90788789 is about 449.4458842145.

The spelling of 90788789 in words is "ninety million, seven hundred eighty-eight thousand, seven hundred eighty-nine".