49993639 has 4 divisors (see below), whose sum is σ = 50596056. Its totient is φ = 49391224.

The previous prime is 49993633. The next prime is 49993663. The reversal of 49993639 is 93639994.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49993639 - 2¹⁹ = 49469351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49993633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301084 + ... + 301249.

It is an arithmetic number, because the mean of its divisors is an integer number (12649014).

Almost surely, 2^49993639 is an apocalyptic number.

49993639 is a deficient number, since it is larger than the sum of its proper divisors (602417).

49993639 is an equidigital number, since it uses as much as digits as its factorization.

49993639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602416.

The product of its digits is 1417176, while the sum is 52.

The square root of 49993639 is about 7070.6180069355. The cubic root of 49993639 is about 368.3875264519.

The spelling of 49993639 in words is "forty-nine million, nine hundred ninety-three thousand, six hundred thirty-nine".