90030917 has 2 divisors, whose sum is σ = 90030918. Its totient is φ = 90030916.

The previous prime is 90030907. The next prime is 90030923. The reversal of 90030917 is 71903009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73376356 + 16654561 = 8566^2 + 4081^2 .

It is a cyclic number.

It is not a de Polignac number, because 90030917 - 2¹⁸ = 89768773 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90030917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90030907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45015458 + 45015459.

It is an arithmetic number, because the mean of its divisors is an integer number (45015459).

Almost surely, 2^90030917 is an apocalyptic number.

It is an amenable number.

90030917 is a deficient number, since it is larger than the sum of its proper divisors (1).

90030917 is an equidigital number, since it uses as much as digits as its factorization.

90030917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 90030917 is about 9488.4623095631. The cubic root of 90030917 is about 448.1917841848.

The spelling of 90030917 in words is "ninety million, thirty thousand, nine hundred seventeen".