49983979 has 4 divisors (see below), whose sum is σ = 50135320. Its totient is φ = 49832640.

The previous prime is 49983971. The next prime is 49984007. The reversal of 49983979 is 97938994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97938994 = 2 ⋅48969497.

It is a cyclic number.

It is not a de Polignac number, because 49983979 - 2³ = 49983971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49983971) 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, 75174 + ... + 75835.

It is an arithmetic number, because the mean of its divisors is an integer number (12533830).

Almost surely, 2^49983979 is an apocalyptic number.

49983979 is a deficient number, since it is larger than the sum of its proper divisors (151341).

49983979 is a wasteful number, since it uses less digits than its factorization.

49983979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151340.

The product of its digits is 4408992, while the sum is 58.

The square root of 49983979 is about 7069.9348653294. The cubic root of 49983979 is about 368.3637977482.

The spelling of 49983979 in words is "forty-nine million, nine hundred eighty-three thousand, nine hundred seventy-nine".