99923961 has 4 divisors (see below), whose sum is σ = 133231952. Its totient is φ = 66615972.

The previous prime is 99923953. The next prime is 99924007. The reversal of 99923961 is 16932999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 99923961 - 2³ = 99923953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99923961.

It is not an unprimeable number, because it can be changed into a prime (99923911) 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 in 3 ways as a sum of consecutive naturals, for example, 16653991 + ... + 16653996.

It is an arithmetic number, because the mean of its divisors is an integer number (33307988).

Almost surely, 2^99923961 is an apocalyptic number.

It is an amenable number.

99923961 is a deficient number, since it is larger than the sum of its proper divisors (33307991).

99923961 is a wasteful number, since it uses less digits than its factorization.

99923961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33307990.

The product of its digits is 236196, while the sum is 48.

The square root of 99923961 is about 9996.1973269839. The cubic root of 99923961 is about 464.0412062716.

The spelling of 99923961 in words is "ninety-nine million, nine hundred twenty-three thousand, nine hundred sixty-one".