9947045723 has 4 divisors (see below), whose sum is σ = 10095509160. Its totient is φ = 9798582288.

The previous prime is 9947045707. The next prime is 9947045741. The reversal of 9947045723 is 3275407499.

9947045723 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9947045723 - 2⁴ = 9947045707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947045743) 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, 74231618 + ... + 74231751.

It is an arithmetic number, because the mean of its divisors is an integer number (2523877290).

Almost surely, 2^9947045723 is an apocalyptic number.

9947045723 is a deficient number, since it is larger than the sum of its proper divisors (148463437).

9947045723 is a wasteful number, since it uses less digits than its factorization.

9947045723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148463436.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The square root of 9947045723 is about 99734.8771644102. The cubic root of 9947045723 is about 2150.6250732024.

The spelling of 9947045723 in words is "nine billion, nine hundred forty-seven million, forty-five thousand, seven hundred twenty-three".