49639687 has 2 divisors, whose sum is σ = 49639688. Its totient is φ = 49639686.

The previous prime is 49639669. The next prime is 49639693. The reversal of 49639687 is 78693694.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49639687 - 2⁷ = 49639559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49639627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24819843 + 24819844.

It is an arithmetic number, because the mean of its divisors is an integer number (24819844).

Almost surely, 2^49639687 is an apocalyptic number.

49639687 is a deficient number, since it is larger than the sum of its proper divisors (1).

49639687 is an equidigital number, since it uses as much as digits as its factorization.

49639687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 49639687 is about 7045.5437689365. The cubic root of 49639687 is about 367.5160793249.

The spelling of 49639687 in words is "forty-nine million, six hundred thirty-nine thousand, six hundred eighty-seven".