49981279 has 4 divisors (see below), whose sum is σ = 50924376. Its totient is φ = 49038184.

The previous prime is 49981271. The next prime is 49981301. The reversal of 49981279 is 97218994.

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 49981279 - 2³ = 49981271 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 (49981271) 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, 471469 + ... + 471574.

It is an arithmetic number, because the mean of its divisors is an integer number (12731094).

Almost surely, 2^49981279 is an apocalyptic number.

49981279 is a deficient number, since it is larger than the sum of its proper divisors (943097).

49981279 is an equidigital number, since it uses as much as digits as its factorization.

49981279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943096.

The product of its digits is 326592, while the sum is 49.

The square root of 49981279 is about 7069.7439133253. The cubic root of 49981279 is about 368.3571649552.

The spelling of 49981279 in words is "forty-nine million, nine hundred eighty-one thousand, two hundred seventy-nine".