99999796427 has 4 divisors (see below), whose sum is σ = 101408244336. Its totient is φ = 98591348520.

The previous prime is 99999796409. The next prime is 99999796441. The reversal of 99999796427 is 72469799999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72469799999 = 1879 ⋅38568281.

It is a cyclic number.

It is not a de Polignac number, because 99999796427 - 2²² = 99995602123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999796487) 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, 704223848 + ... + 704223989.

It is an arithmetic number, because the mean of its divisors is an integer number (25352061084).

Almost surely, 2^99999796427 is an apocalyptic number.

99999796427 is a deficient number, since it is larger than the sum of its proper divisors (1408447909).

99999796427 is a wasteful number, since it uses less digits than its factorization.

99999796427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408447908.

The product of its digits is 1249949232, while the sum is 80.

The spelling of 99999796427 in words is "ninety-nine billion, nine hundred ninety-nine million, seven hundred ninety-six thousand, four hundred twenty-seven".