47578739 has 6 divisors (see below), whose sum is σ = 51520356. Its totient is φ = 43918680.

The previous prime is 47578703. The next prime is 47578757. The reversal of 47578739 is 93787574.

It is not a de Polignac number, because 47578739 - 2⁸ = 47578483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47578759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140597 + ... + 140934.

It is an arithmetic number, because the mean of its divisors is an integer number (8586726).

Almost surely, 2^47578739 is an apocalyptic number.

47578739 is a deficient number, since it is larger than the sum of its proper divisors (3941617).

47578739 is a wasteful number, since it uses less digits than its factorization.

47578739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281557 (or 281544 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 50.

The square root of 47578739 is about 6897.7343381722. The cubic root of 47578739 is about 362.3578235942.

The spelling of 47578739 in words is "forty-seven million, five hundred seventy-eight thousand, seven hundred thirty-nine".