90344993 has 2 divisors, whose sum is σ = 90344994. Its totient is φ = 90344992.

The previous prime is 90344983. The next prime is 90344999. The reversal of 90344993 is 39944309.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57259489 + 33085504 = 7567^2 + 5752^2 .

It is a cyclic number.

It is not a de Polignac number, because 90344993 - 2¹⁶ = 90279457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90344993.

It is not a weakly prime, because it can be changed into another prime (90344999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45172496 + 45172497.

It is an arithmetic number, because the mean of its divisors is an integer number (45172497).

Almost surely, 2^90344993 is an apocalyptic number.

It is an amenable number.

90344993 is a deficient number, since it is larger than the sum of its proper divisors (1).

90344993 is an equidigital number, since it uses as much as digits as its factorization.

90344993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 90344993 is about 9504.9983166753. The cubic root of 90344993 is about 448.7123568748.

The spelling of 90344993 in words is "ninety million, three hundred forty-four thousand, nine hundred ninety-three".