49639147 has 4 divisors (see below), whose sum is σ = 49727880. Its totient is φ = 49550416.

The previous prime is 49639141. The next prime is 49639169. The reversal of 49639147 is 74193694.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49639147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49639141) 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, 43522 + ... + 44647.

It is an arithmetic number, because the mean of its divisors is an integer number (12431970).

Almost surely, 2^49639147 is an apocalyptic number.

49639147 is a deficient number, since it is larger than the sum of its proper divisors (88733).

49639147 is an equidigital number, since it uses as much as digits as its factorization.

49639147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88732.

The product of its digits is 163296, while the sum is 43.

The square root of 49639147 is about 7045.5054467369. The cubic root of 49639147 is about 367.5147466586.

The spelling of 49639147 in words is "forty-nine million, six hundred thirty-nine thousand, one hundred forty-seven".