49161839 has 4 divisors (see below), whose sum is σ = 49343520. Its totient is φ = 48980160.

The previous prime is 49161823. The next prime is 49161869. The reversal of 49161839 is 93816194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93816194 = 2 ⋅46908097.

It is a cyclic number.

It is not a de Polignac number, because 49161839 - 2⁴ = 49161823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49161796 and 49161805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49161869) 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, 90434 + ... + 90975.

It is an arithmetic number, because the mean of its divisors is an integer number (12335880).

Almost surely, 2^49161839 is an apocalyptic number.

49161839 is a deficient number, since it is larger than the sum of its proper divisors (181681).

49161839 is a wasteful number, since it uses less digits than its factorization.

49161839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181680.

The product of its digits is 46656, while the sum is 41.

The square root of 49161839 is about 7011.5503991628. The cubic root of 49161839 is about 366.3329979209.

The spelling of 49161839 in words is "forty-nine million, one hundred sixty-one thousand, eight hundred thirty-nine".