99979345 has 4 divisors (see below), whose sum is σ = 119975220. Its totient is φ = 79983472.

The previous prime is 99979337. The next prime is 99979357. The reversal of 99979345 is 54397999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54397999 = 71 ⋅766169.

It can be written as a sum of positive squares in 2 ways, for example, as 46294416 + 53684929 = 6804^2 + 7327^2 .

It is a cyclic number.

It is not a de Polignac number, because 99979345 - 2³ = 99979337 is a prime.

It is an unprimeable number.

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, 9997930 + ... + 9997939.

It is an arithmetic number, because the mean of its divisors is an integer number (29993805).

Almost surely, 2^99979345 is an apocalyptic number.

It is an amenable number.

99979345 is a deficient number, since it is larger than the sum of its proper divisors (19995875).

99979345 is a wasteful number, since it uses less digits than its factorization.

99979345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19995874.

The product of its digits is 2755620, while the sum is 55.

The square root of 99979345 is about 9998.9671966659. The cubic root of 99979345 is about 464.1269238216.

The spelling of 99979345 in words is "ninety-nine million, nine hundred seventy-nine thousand, three hundred forty-five".