49539839 has 2 divisors, whose sum is σ = 49539840. Its totient is φ = 49539838.

The previous prime is 49539811. The next prime is 49539851. The reversal of 49539839 is 93893594.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49539839 - 2⁸ = 49539583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49539239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24769919 + 24769920.

It is an arithmetic number, because the mean of its divisors is an integer number (24769920).

Almost surely, 2^49539839 is an apocalyptic number.

49539839 is a deficient number, since it is larger than the sum of its proper divisors (1).

49539839 is an equidigital number, since it uses as much as digits as its factorization.

49539839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 49539839 is about 7038.4543047462. The cubic root of 49539839 is about 367.2694998963.

The spelling of 49539839 in words is "forty-nine million, five hundred thirty-nine thousand, eight hundred thirty-nine".