39847470979 has 4 divisors (see below), whose sum is σ = 39873844080. Its totient is φ = 39821097880.

The previous prime is 39847470973. The next prime is 39847470983. The reversal of 39847470979 is 97907474893.

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 39847470979 - 2²⁹ = 39310600067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39847470973) 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, 13184284 + ... + 13187305.

It is an arithmetic number, because the mean of its divisors is an integer number (9968461020).

Almost surely, 2^39847470979 is an apocalyptic number.

39847470979 is a deficient number, since it is larger than the sum of its proper divisors (26373101).

39847470979 is a wasteful number, since it uses less digits than its factorization.

39847470979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26373100.

The product of its (nonzero) digits is 96018048, while the sum is 67.

The spelling of 39847470979 in words is "thirty-nine billion, eight hundred forty-seven million, four hundred seventy thousand, nine hundred seventy-nine".