99933691 has 16 divisors (see below), whose sum is σ = 118284768. Its totient is φ = 83232000.

The previous prime is 99933661. The next prime is 99933709. The reversal of 99933691 is 19633999.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99933691 - 2¹³ = 99925499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99933601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17041 + ... + 22141.

It is an arithmetic number, because the mean of its divisors is an integer number (7392798).

Almost surely, 2^99933691 is an apocalyptic number.

99933691 is a deficient number, since it is larger than the sum of its proper divisors (18351077).

99933691 is a wasteful number, since it uses less digits than its factorization.

99933691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262.

The product of its digits is 354294, while the sum is 49.

The square root of 99933691 is about 9996.6840002073. The cubic root of 99933691 is about 464.0562676388.

The spelling of 99933691 in words is "ninety-nine million, nine hundred thirty-three thousand, six hundred ninety-one".