90923789 has 8 divisors (see below), whose sum is σ = 99392832. Its totient is φ = 82488640.

The previous prime is 90923771. The next prime is 90923813. The reversal of 90923789 is 98732909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90923789 is a prime.

It is a super-2 number, since 2×90923789² = 16534270812233042, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90923389) 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, 2684 + ... + 13749.

It is an arithmetic number, because the mean of its divisors is an integer number (12424104).

Almost surely, 2^90923789 is an apocalyptic number.

It is an amenable number.

90923789 is a deficient number, since it is larger than the sum of its proper divisors (8469043).

90923789 is a wasteful number, since it uses less digits than its factorization.

90923789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16947.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 90923789 is about 9535.3966356938. The cubic root of 90923789 is about 449.6685443977.

The spelling of 90923789 in words is "ninety million, nine hundred twenty-three thousand, seven hundred eighty-nine".