9939279447 has 16 divisors (see below), whose sum is σ = 14766586080. Its totient is φ = 6607408896.

The previous prime is 9939279403. The next prime is 9939279481. The reversal of 9939279447 is 7449729399.

9939279447 is a `hidden beast` number, since 99 + 39 + 2 + 79 + 447 = 666.

9939279447 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9939279447 - 2⁷ = 9939279319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939279947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511888 + ... + 530949.

It is an arithmetic number, because the mean of its divisors is an integer number (922911630).

Almost surely, 2^9939279447 is an apocalyptic number.

9939279447 is a deficient number, since it is larger than the sum of its proper divisors (4827306633).

9939279447 is a wasteful number, since it uses less digits than its factorization.

9939279447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043199 (or 1043193 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The square root of 9939279447 is about 99695.9349572489. The cubic root of 9939279447 is about 2150.0652186454.

The spelling of 9939279447 in words is "nine billion, nine hundred thirty-nine million, two hundred seventy-nine thousand, four hundred forty-seven".