99979361 has 4 divisors (see below), whose sum is σ = 102417924. Its totient is φ = 97540800.

The previous prime is 99979357. The next prime is 99979381. The reversal of 99979361 is 16397999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39450961 + 60528400 = 6281^2 + 7780^2 .

It is a cyclic number.

It is not a de Polignac number, because 99979361 - 2² = 99979357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99979381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1219220 + ... + 1219301.

It is an arithmetic number, because the mean of its divisors is an integer number (25604481).

Almost surely, 2^99979361 is an apocalyptic number.

It is an amenable number.

99979361 is a deficient number, since it is larger than the sum of its proper divisors (2438563).

99979361 is a wasteful number, since it uses less digits than its factorization.

99979361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438562.

The product of its digits is 826686, while the sum is 53.

The square root of 99979361 is about 9998.9679967485. The cubic root of 99979361 is about 464.1269485802.

The spelling of 99979361 in words is "ninety-nine million, nine hundred seventy-nine thousand, three hundred sixty-one".