49778191 has 8 divisors (see below), whose sum is σ = 50279040. Its totient is φ = 49280088.

The previous prime is 49778177. The next prime is 49778213. The reversal of 49778191 is 19187794.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49778191 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 (49778161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57520 + ... + 58378.

It is an arithmetic number, because the mean of its divisors is an integer number (6284880).

Almost surely, 2^49778191 is an apocalyptic number.

49778191 is a deficient number, since it is larger than the sum of its proper divisors (500849).

49778191 is a wasteful number, since it uses less digits than its factorization.

49778191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373.

The product of its digits is 127008, while the sum is 46.

The square root of 49778191 is about 7055.3661138172. The cubic root of 49778191 is about 367.8575747487.

The spelling of 49778191 in words is "forty-nine million, seven hundred seventy-eight thousand, one hundred ninety-one".