99991733 has 2 divisors, whose sum is σ = 99991734. Its totient is φ = 99991732.

The previous prime is 99991721. The next prime is 99991753. The reversal of 99991733 is 33719999.

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., 96393124 + 3598609 = 9818^2 + 1897^2 .

It is a cyclic number.

It is not a de Polignac number, because 99991733 - 2¹⁴ = 99975349 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 (99991753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49995866 + 49995867.

It is an arithmetic number, because the mean of its divisors is an integer number (49995867).

Almost surely, 2^99991733 is an apocalyptic number.

It is an amenable number.

99991733 is a deficient number, since it is larger than the sum of its proper divisors (1).

99991733 is an equidigital number, since it uses as much as digits as its factorization.

99991733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 413343, while the sum is 50.

The square root of 99991733 is about 9999.5866414567. The cubic root of 99991733 is about 464.1460923372.

The spelling of 99991733 in words is "ninety-nine million, nine hundred ninety-one thousand, seven hundred thirty-three".