99717099749 has 4 divisors (see below), whose sum is σ = 103155620460. Its totient is φ = 96278579040.

The previous prime is 99717099719. The next prime is 99717099793. The reversal of 99717099749 is 94799071799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94799071799 = 12547 ⋅7555517.

It can be written as a sum of positive squares in 2 ways, for example, as 57507397249 + 42209702500 = 239807^2 + 205450^2 .

It is a cyclic number.

It is not a de Polignac number, because 99717099749 - 2³² = 95422132453 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 (99717099709) 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, 1719260312 + ... + 1719260369.

It is an arithmetic number, because the mean of its divisors is an integer number (25788905115).

Almost surely, 2^99717099749 is an apocalyptic number.

It is an amenable number.

99717099749 is a deficient number, since it is larger than the sum of its proper divisors (3438520711).

99717099749 is a wasteful number, since it uses less digits than its factorization.

99717099749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438520710.

The product of its (nonzero) digits is 81015228, while the sum is 71.

The spelling of 99717099749 in words is "ninety-nine billion, seven hundred seventeen million, ninety-nine thousand, seven hundred forty-nine".