49697839 has 2 divisors, whose sum is σ = 49697840. Its totient is φ = 49697838.

The previous prime is 49697833. The next prime is 49697861. The reversal of 49697839 is 93879694.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49697839 - 2³ = 49697831 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49697839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49697831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24848919 + 24848920.

It is an arithmetic number, because the mean of its divisors is an integer number (24848920).

Almost surely, 2^49697839 is an apocalyptic number.

49697839 is a deficient number, since it is larger than the sum of its proper divisors (1).

49697839 is an equidigital number, since it uses as much as digits as its factorization.

49697839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 49697839 is about 7049.6694248738. The cubic root of 49697839 is about 367.6595361448.

The spelling of 49697839 in words is "forty-nine million, six hundred ninety-seven thousand, eight hundred thirty-nine".