49779643 has 4 divisors (see below), whose sum is σ = 49793760. Its totient is φ = 49765528.

The previous prime is 49779641. The next prime is 49779661. The reversal of 49779643 is 34697794.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 49779643 - 2¹ = 49779641 is a prime.

It is a Smith number, since the sum of its digits (49) 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 not an unprimeable number, because it can be changed into a prime (49779641) 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, 3246 + ... + 10492.

It is an arithmetic number, because the mean of its divisors is an integer number (12448440).

Almost surely, 2^49779643 is an apocalyptic number.

49779643 is a deficient number, since it is larger than the sum of its proper divisors (14117).

49779643 is an equidigital number, since it uses as much as digits as its factorization.

49779643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14116.

The product of its digits is 1143072, while the sum is 49.

The square root of 49779643 is about 7055.4690134675. The cubic root of 49779643 is about 367.8611514423.

The spelling of 49779643 in words is "forty-nine million, seven hundred seventy-nine thousand, six hundred forty-three".