49684139 has 2 divisors, whose sum is σ = 49684140. Its totient is φ = 49684138.

The previous prime is 49684133. The next prime is 49684147. The reversal of 49684139 is 93148694.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49684139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49684139.

It is not a weakly prime, because it can be changed into another prime (49684133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24842069 + 24842070.

It is an arithmetic number, because the mean of its divisors is an integer number (24842070).

Almost surely, 2^49684139 is an apocalyptic number.

49684139 is a deficient number, since it is larger than the sum of its proper divisors (1).

49684139 is an equidigital number, since it uses as much as digits as its factorization.

49684139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 49684139 is about 7048.6976811323. The cubic root of 49684139 is about 367.6257493064.

The spelling of 49684139 in words is "forty-nine million, six hundred eighty-four thousand, one hundred thirty-nine".