99481817 has 4 divisors (see below), whose sum is σ = 99511056. Its totient is φ = 99452580.

The previous prime is 99481799. The next prime is 99481819. The reversal of 99481817 is 71818499.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71818499 = 19 ⋅3779921.

It is a cyclic number.

It is not a de Polignac number, because 99481817 - 2⁸ = 99481561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99481819) 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, 8723 + ... + 16584.

It is an arithmetic number, because the mean of its divisors is an integer number (24877764).

Almost surely, 2^99481817 is an apocalyptic number.

It is an amenable number.

99481817 is a deficient number, since it is larger than the sum of its proper divisors (29239).

99481817 is a wasteful number, since it uses less digits than its factorization.

99481817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29238.

The product of its digits is 145152, while the sum is 47.

The square root of 99481817 is about 9974.0571985527. The cubic root of 99481817 is about 463.3557637411.

The spelling of 99481817 in words is "ninety-nine million, four hundred eighty-one thousand, eight hundred seventeen".