90012493 has 2 divisors, whose sum is σ = 90012494. Its totient is φ = 90012492.

The previous prime is 90012487. The next prime is 90012551. The reversal of 90012493 is 39421009.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51236964 + 38775529 = 7158^2 + 6227^2 .

It is an emirp because it is prime and its reverse (39421009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90012493 - 2¹³ = 90004301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90012413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45006246 + 45006247.

It is an arithmetic number, because the mean of its divisors is an integer number (45006247).

Almost surely, 2^90012493 is an apocalyptic number.

It is an amenable number.

90012493 is a deficient number, since it is larger than the sum of its proper divisors (1).

90012493 is an equidigital number, since it uses as much as digits as its factorization.

90012493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 90012493 is about 9487.4913965705. The cubic root of 90012493 is about 448.1612093221.

The spelling of 90012493 in words is "ninety million, twelve thousand, four hundred ninety-three".