90030933 has 10 divisors (see below), whose sum is σ = 134490774. Its totient is φ = 60020568.

The previous prime is 90030923. The next prime is 90030959. The reversal of 90030933 is 33903009.

It can be written as a sum of positive squares in only one way, i.e., 60186564 + 29844369 = 7758^2 + 5463^2 .

It is not a de Polignac number, because 90030933 - 2⁴ = 90030917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90030897 and 90030906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90030923) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 555666 + ... + 555827.

Almost surely, 2^90030933 is an apocalyptic number.

It is an amenable number.

90030933 is a deficient number, since it is larger than the sum of its proper divisors (44459841).

90030933 is a wasteful number, since it uses less digits than its factorization.

90030933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111505 (or 1111496 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 90030933 is about 9488.4631526923. The cubic root of 90030933 is about 448.1918107351.

The spelling of 90030933 in words is "ninety million, thirty thousand, nine hundred thirty-three".