99879897899 has 4 divisors (see below), whose sum is σ = 99907777536. Its totient is φ = 99852018264.

The previous prime is 99879897877. The next prime is 99879897913.

99879897899 is nontrivially palindromic in base 10.

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 99879897899 - 2⁸ = 99879897643 is a prime.

It is a super-2 number, since 2×99879897899² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99879897839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13934444 + ... + 13941609.

It is an arithmetic number, because the mean of its divisors is an integer number (24976944384).

Almost surely, 2^99879897899 is an apocalyptic number.

99879897899 is a deficient number, since it is larger than the sum of its proper divisors (27879637).

99879897899 is a wasteful number, since it uses less digits than its factorization.

99879897899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27879636.

The product of its digits is 13332791808, while the sum is 92.

The spelling of 99879897899 in words is "ninety-nine billion, eight hundred seventy-nine million, eight hundred ninety-seven thousand, eight hundred ninety-nine".