49618139 has 4 divisors (see below), whose sum is σ = 52229640. Its totient is φ = 47006640.

The previous prime is 49618133. The next prime is 49618141. The reversal of 49618139 is 93181694.

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-49618139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49618096 and 49618105.

It is not an unprimeable number, because it can be changed into a prime (49618133) 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, 1305722 + ... + 1305759.

It is an arithmetic number, because the mean of its divisors is an integer number (13057410).

Almost surely, 2^49618139 is an apocalyptic number.

49618139 is a deficient number, since it is larger than the sum of its proper divisors (2611501).

49618139 is a wasteful number, since it uses less digits than its factorization.

49618139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611500.

The product of its digits is 46656, while the sum is 41.

The square root of 49618139 is about 7044.0144094117. The cubic root of 49618139 is about 367.4628935031.

The spelling of 49618139 in words is "forty-nine million, six hundred eighteen thousand, one hundred thirty-nine".