49721863 has 4 divisors (see below), whose sum is σ = 51436440. Its totient is φ = 48007288.

The previous prime is 49721851. The next prime is 49721869. The reversal of 49721863 is 36812794.

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 49721863 - 2¹⁷ = 49590791 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49721869) 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, 857245 + ... + 857302.

It is an arithmetic number, because the mean of its divisors is an integer number (12859110).

Almost surely, 2^49721863 is an apocalyptic number.

49721863 is a deficient number, since it is larger than the sum of its proper divisors (1714577).

49721863 is a wasteful number, since it uses less digits than its factorization.

49721863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714576.

The product of its digits is 72576, while the sum is 40.

The square root of 49721863 is about 7051.3731286892. The cubic root of 49721863 is about 367.7187689673.

The spelling of 49721863 in words is "forty-nine million, seven hundred twenty-one thousand, eight hundred sixty-three".