49687439 has 2 divisors, whose sum is σ = 49687440. Its totient is φ = 49687438.

The previous prime is 49687427. The next prime is 49687441. The reversal of 49687439 is 93478694.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49687439 - 2¹² = 49683343 is a prime.

Together with 49687441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49687409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24843719 + 24843720.

It is an arithmetic number, because the mean of its divisors is an integer number (24843720).

Almost surely, 2^49687439 is an apocalyptic number.

49687439 is a deficient number, since it is larger than the sum of its proper divisors (1).

49687439 is an equidigital number, since it uses as much as digits as its factorization.

49687439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 49687439 is about 7048.9317630404. The cubic root of 49687439 is about 367.6338883097.

The spelling of 49687439 in words is "forty-nine million, six hundred eighty-seven thousand, four hundred thirty-nine".