9949989745 has 4 divisors (see below), whose sum is σ = 11939987700. Its totient is φ = 7959991792.

The previous prime is 9949989737. The next prime is 9949989781. The reversal of 9949989745 is 5479899499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3820352481 + 6129637264 = 61809^2 + 78292^2 .

It is a cyclic number.

It is not a de Polignac number, because 9949989745 - 2³ = 9949989737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994998970 + ... + 994998979.

It is an arithmetic number, because the mean of its divisors is an integer number (2984996925).

Almost surely, 2^9949989745 is an apocalyptic number.

It is an amenable number.

9949989745 is a deficient number, since it is larger than the sum of its proper divisors (1989997955).

9949989745 is a wasteful number, since it uses less digits than its factorization.

9949989745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989997954.

The product of its digits is 264539520, while the sum is 73.

The square root of 9949989745 is about 99749.6353126166. The cubic root of 9949989745 is about 2150.8372254054.

The spelling of 9949989745 in words is "nine billion, nine hundred forty-nine million, nine hundred eighty-nine thousand, seven hundred forty-five".