49671779 has 4 divisors (see below), whose sum is σ = 49739376. Its totient is φ = 49604184.

The previous prime is 49671763. The next prime is 49671781. The reversal of 49671779 is 97717694.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97717694 = 2 ⋅48858847.

It is a cyclic number.

It is not a de Polignac number, because 49671779 - 2⁴ = 49671763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49671079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32684 + ... + 34169.

It is an arithmetic number, because the mean of its divisors is an integer number (12434844).

Almost surely, 2^49671779 is an apocalyptic number.

49671779 is a deficient number, since it is larger than the sum of its proper divisors (67597).

49671779 is an equidigital number, since it uses as much as digits as its factorization.

49671779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67596.

The product of its digits is 666792, while the sum is 50.

The square root of 49671779 is about 7047.8208688927. The cubic root of 49671779 is about 367.5952618363.

The spelling of 49671779 in words is "forty-nine million, six hundred seventy-one thousand, seven hundred seventy-nine".