99933661 has 2 divisors, whose sum is σ = 99933662. Its totient is φ = 99933660.

The previous prime is 99933653. The next prime is 99933709. The reversal of 99933661 is 16633999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60933636 + 39000025 = 7806^2 + 6245^2 .

It is a cyclic number.

It is not a de Polignac number, because 99933661 - 2³ = 99933653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99933601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49966830 + 49966831.

It is an arithmetic number, because the mean of its divisors is an integer number (49966831).

Almost surely, 2^99933661 is an apocalyptic number.

It is an amenable number.

99933661 is a deficient number, since it is larger than the sum of its proper divisors (1).

99933661 is an equidigital number, since it uses as much as digits as its factorization.

99933661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 99933661 is about 9996.6824997096. The cubic root of 99933661 is about 464.0562212024.

The spelling of 99933661 in words is "ninety-nine million, nine hundred thirty-three thousand, six hundred sixty-one".