49917139 has 4 divisors (see below), whose sum is σ = 49931856. Its totient is φ = 49902424.

The previous prime is 49917089. The next prime is 49917167. The reversal of 49917139 is 93171994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 49917139 - 2⁷ = 49917011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49917095 and 49917104.

It is not an unprimeable number, because it can be changed into a prime (49917739) 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, 597 + ... + 10009.

It is an arithmetic number, because the mean of its divisors is an integer number (12482964).

Almost surely, 2^49917139 is an apocalyptic number.

49917139 is a deficient number, since it is larger than the sum of its proper divisors (14717).

49917139 is an equidigital number, since it uses as much as digits as its factorization.

49917139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14716.

The product of its digits is 61236, while the sum is 43.

The square root of 49917139 is about 7065.2062248741. The cubic root of 49917139 is about 368.1995289850.

The spelling of 49917139 in words is "forty-nine million, nine hundred seventeen thousand, one hundred thirty-nine".