99879940607 has 4 divisors (see below), whose sum is σ = 103324076520. Its totient is φ = 96435804696.

The previous prime is 99879940543. The next prime is 99879940613. The reversal of 99879940607 is 70604997899.

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

It is a cyclic number.

It is not a de Polignac number, because 99879940607 - 2⁶ = 99879940543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99879940637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722067913 + ... + 1722067970.

It is an arithmetic number, because the mean of its divisors is an integer number (25831019130).

Almost surely, 2^99879940607 is an apocalyptic number.

99879940607 is a deficient number, since it is larger than the sum of its proper divisors (3444135913).

99879940607 is a wasteful number, since it uses less digits than its factorization.

99879940607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444135912.

The product of its (nonzero) digits is 61725888, while the sum is 68.

The spelling of 99879940607 in words is "ninety-nine billion, eight hundred seventy-nine million, nine hundred forty thousand, six hundred seven".