50663639 has 4 divisors (see below), whose sum is σ = 54560856. Its totient is φ = 46766424.

The previous prime is 50663629. The next prime is 50663651. The reversal of 50663639 is 93636605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93636605 = 5 ⋅18727321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50663639 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 (50663629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1948589 + ... + 1948614.

It is an arithmetic number, because the mean of its divisors is an integer number (13640214).

Almost surely, 2^50663639 is an apocalyptic number.

50663639 is a deficient number, since it is larger than the sum of its proper divisors (3897217).

50663639 is a wasteful number, since it uses less digits than its factorization.

50663639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3897216.

The product of its (nonzero) digits is 87480, while the sum is 38.

The square root of 50663639 is about 7117.8394896204. The cubic root of 50663639 is about 370.0259027398.

The spelling of 50663639 in words is "fifty million, six hundred sixty-three thousand, six hundred thirty-nine".