99427817 has 4 divisors (see below), whose sum is σ = 104660880. Its totient is φ = 94194756.

The previous prime is 99427777. The next prime is 99427831. The reversal of 99427817 is 71872499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99427817 - 2⁸ = 99427561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99427837) 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, 2616503 + ... + 2616540.

It is an arithmetic number, because the mean of its divisors is an integer number (26165220).

Almost surely, 2^99427817 is an apocalyptic number.

It is an amenable number.

99427817 is a deficient number, since it is larger than the sum of its proper divisors (5233063).

99427817 is a wasteful number, since it uses less digits than its factorization.

99427817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233062.

The product of its digits is 254016, while the sum is 47.

The square root of 99427817 is about 9971.3498083259. The cubic root of 99427817 is about 463.2719100928.

The spelling of 99427817 in words is "ninety-nine million, four hundred twenty-seven thousand, eight hundred seventeen".