99939473 has 2 divisors, whose sum is σ = 99939474. Its totient is φ = 99939472.

The previous prime is 99939421. The next prime is 99939491. The reversal of 99939473 is 37493999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86638864 + 13300609 = 9308^2 + 3647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99939473 is a prime.

It is not a weakly prime, because it can be changed into another prime (99939773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49969736 + 49969737.

It is an arithmetic number, because the mean of its divisors is an integer number (49969737).

Almost surely, 2^99939473 is an apocalyptic number.

It is an amenable number.

99939473 is a deficient number, since it is larger than the sum of its proper divisors (1).

99939473 is an equidigital number, since it uses as much as digits as its factorization.

99939473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 53.

The square root of 99939473 is about 9996.9731919216. The cubic root of 99939473 is about 464.0652173119.

The spelling of 99939473 in words is "ninety-nine million, nine hundred thirty-nine thousand, four hundred seventy-three".