47173979 has 4 divisors (see below), whose sum is σ = 49656840. Its totient is φ = 44691120.

The previous prime is 47173957. The next prime is 47174009. The reversal of 47173979 is 97937174.

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 47173979 - 2¹⁶ = 47108443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47173939) 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, 1241402 + ... + 1241439.

It is an arithmetic number, because the mean of its divisors is an integer number (12414210).

Almost surely, 2^47173979 is an apocalyptic number.

47173979 is a deficient number, since it is larger than the sum of its proper divisors (2482861).

47173979 is a wasteful number, since it uses less digits than its factorization.

47173979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482860.

The product of its digits is 333396, while the sum is 47.

The square root of 47173979 is about 6868.3316023617. The cubic root of 47173979 is about 361.3273504461.

The spelling of 47173979 in words is "forty-seven million, one hundred seventy-three thousand, nine hundred seventy-nine".