49928779 has 4 divisors (see below), whose sum is σ = 52865784. Its totient is φ = 46991776.

The previous prime is 49928771. The next prime is 49928803. The reversal of 49928779 is 97782994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97782994 = 2 ⋅48891497.

It is a cyclic number.

It is not a de Polignac number, because 49928779 - 2³ = 49928771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49928771) 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, 1468477 + ... + 1468510.

It is an arithmetic number, because the mean of its divisors is an integer number (13216446).

Almost surely, 2^49928779 is an apocalyptic number.

49928779 is a deficient number, since it is larger than the sum of its proper divisors (2937005).

49928779 is a wasteful number, since it uses less digits than its factorization.

49928779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937004.

The product of its digits is 2286144, while the sum is 55.

The square root of 49928779 is about 7066.0299320057. The cubic root of 49928779 is about 368.2281464734.

The spelling of 49928779 in words is "forty-nine million, nine hundred twenty-eight thousand, seven hundred seventy-nine".