49978871 has 4 divisors (see below), whose sum is σ = 50055144. Its totient is φ = 49902600.

The previous prime is 49978867. The next prime is 49978889. The reversal of 49978871 is 17887994.

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 49978871 - 2² = 49978867 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 (49978811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37145 + ... + 38466.

It is an arithmetic number, because the mean of its divisors is an integer number (12513786).

Almost surely, 2^49978871 is an apocalyptic number.

49978871 is a deficient number, since it is larger than the sum of its proper divisors (76273).

49978871 is an equidigital number, since it uses as much as digits as its factorization.

49978871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76272.

The product of its digits is 1016064, while the sum is 53.

The square root of 49978871 is about 7069.5736080757. The cubic root of 49978871 is about 368.3512492849.

The spelling of 49978871 in words is "forty-nine million, nine hundred seventy-eight thousand, eight hundred seventy-one".