49983639 has 4 divisors (see below), whose sum is σ = 66644856. Its totient is φ = 33322424.

The previous prime is 49983589. The next prime is 49983643. The reversal of 49983639 is 93638994.

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 49983639 - 2⁹ = 49983127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49983591 and 49983600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49983649) 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, 8330604 + ... + 8330609.

It is an arithmetic number, because the mean of its divisors is an integer number (16661214).

Almost surely, 2^49983639 is an apocalyptic number.

49983639 is a deficient number, since it is larger than the sum of its proper divisors (16661217).

49983639 is a wasteful number, since it uses less digits than its factorization.

49983639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16661216.

The product of its digits is 1259712, while the sum is 51.

The square root of 49983639 is about 7069.9108198053. The cubic root of 49983639 is about 368.3629625208.

The spelling of 49983639 in words is "forty-nine million, nine hundred eighty-three thousand, six hundred thirty-nine".