47742939 has 28 divisors (see below), whose sum is σ = 72575200. Its totient is φ = 31387824.

The previous prime is 47742923. The next prime is 47742941. The reversal of 47742939 is 93924774.

It is not a de Polignac number, because 47742939 - 2⁴ = 47742923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47742894 and 47742903.

It is not an unprimeable number, because it can be changed into a prime (47746939) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 57177 + ... + 58005.

Almost surely, 2^47742939 is an apocalyptic number.

47742939 is a deficient number, since it is larger than the sum of its proper divisors (24832261).

47742939 is an frugal number, since it uses more digits than its factorization.

47742939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 911 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 47742939 is about 6909.6265456246. The cubic root of 47742939 is about 362.7741919171.

The spelling of 47742939 in words is "forty-seven million, seven hundred forty-two thousand, nine hundred thirty-nine".