90030923 has 2 divisors, whose sum is σ = 90030924. Its totient is φ = 90030922.

The previous prime is 90030917. The next prime is 90030959. The reversal of 90030923 is 32903009.

It is a weak prime.

It is an emirp because it is prime and its reverse (32903009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90030923 - 2⁴ = 90030907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90030892 and 90030901.

It is not a weakly prime, because it can be changed into another prime (90030023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45015461 + 45015462.

It is an arithmetic number, because the mean of its divisors is an integer number (45015462).

Almost surely, 2^90030923 is an apocalyptic number.

90030923 is a deficient number, since it is larger than the sum of its proper divisors (1).

90030923 is an equidigital number, since it uses as much as digits as its factorization.

90030923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 90030923 is about 9488.4626257366. The cubic root of 90030923 is about 448.1917941411.

The spelling of 90030923 in words is "ninety million, thirty thousand, nine hundred twenty-three".