49729161 has 4 divisors (see below), whose sum is σ = 66305552. Its totient is φ = 33152772.

The previous prime is 49729159. The next prime is 49729193. The reversal of 49729161 is 16192794.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 49729161 - 2¹ = 49729159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49729661) 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, 8288191 + ... + 8288196.

It is an arithmetic number, because the mean of its divisors is an integer number (16576388).

Almost surely, 2^49729161 is an apocalyptic number.

It is an amenable number.

49729161 is a deficient number, since it is larger than the sum of its proper divisors (16576391).

49729161 is a wasteful number, since it uses less digits than its factorization.

49729161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16576390.

The product of its digits is 27216, while the sum is 39.

The square root of 49729161 is about 7051.8905975632. The cubic root of 49729161 is about 367.7367589093.

The spelling of 49729161 in words is "forty-nine million, seven hundred twenty-nine thousand, one hundred sixty-one".