99541979 has 2 divisors, whose sum is σ = 99541980. Its totient is φ = 99541978.

The previous prime is 99541963. The next prime is 99541991. The reversal of 99541979 is 97914599.

It is a strong prime.

It is an emirp because it is prime and its reverse (97914599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99541979 - 2⁴ = 99541963 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99541979.

It is not a weakly prime, because it can be changed into another prime (99541879) 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, 49770989 + 49770990.

It is an arithmetic number, because the mean of its divisors is an integer number (49770990).

Almost surely, 2^99541979 is an apocalyptic number.

99541979 is a deficient number, since it is larger than the sum of its proper divisors (1).

99541979 is an equidigital number, since it uses as much as digits as its factorization.

99541979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 53.

The square root of 99541979 is about 9977.0726668698. The cubic root of 99541979 is about 463.4491502940.

The spelling of 99541979 in words is "ninety-nine million, five hundred forty-one thousand, nine hundred seventy-nine".