49697161 has 4 divisors (see below), whose sum is σ = 50060052. Its totient is φ = 49334272.

The previous prime is 49697147. The next prime is 49697173. The reversal of 49697161 is 16179694.

It is a happy number.

49697161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 34047225 = 3956^2 + 5835^2 .

It is a cyclic number.

It is not a de Polignac number, because 49697161 - 2⁹ = 49696649 is a prime.

It is a super-2 number, since 2×49697161² = 4939615622919842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49697101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181240 + ... + 181513.

It is an arithmetic number, because the mean of its divisors is an integer number (12515013).

Almost surely, 2^49697161 is an apocalyptic number.

It is an amenable number.

49697161 is a deficient number, since it is larger than the sum of its proper divisors (362891).

49697161 is a wasteful number, since it uses less digits than its factorization.

49697161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362890.

The product of its digits is 81648, while the sum is 43.

The square root of 49697161 is about 7049.6213373486. The cubic root of 49697161 is about 367.6578642122.

The spelling of 49697161 in words is "forty-nine million, six hundred ninety-seven thousand, one hundred sixty-one".