99890573 has 2 divisors, whose sum is σ = 99890574. Its totient is φ = 99890572.

The previous prime is 99890569. The next prime is 99890579. The reversal of 99890573 is 37509899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83137924 + 16752649 = 9118^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 99890573 - 2² = 99890569 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99890579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49945286 + 49945287.

It is an arithmetic number, because the mean of its divisors is an integer number (49945287).

Almost surely, 2^99890573 is an apocalyptic number.

It is an amenable number.

99890573 is a deficient number, since it is larger than the sum of its proper divisors (1).

99890573 is an equidigital number, since it uses as much as digits as its factorization.

99890573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 99890573 is about 9994.5271523970. The cubic root of 99890573 is about 463.9895165215.

The spelling of 99890573 in words is "ninety-nine million, eight hundred ninety thousand, five hundred seventy-three".