73721061 has 12 divisors (see below), whose sum is σ = 112750092. Its totient is φ = 46256256.

The previous prime is 73721059. The next prime is 73721071. The reversal of 73721061 is 16012737.

It can be written as a sum of positive squares in 2 ways, for example, as 65512836 + 8208225 = 8094^2 + 2865^2 .

It is not a de Polignac number, because 73721061 - 2¹ = 73721059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73721041) 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 11 ways as a sum of consecutive naturals, for example, 240766 + ... + 241071.

It is an arithmetic number, because the mean of its divisors is an integer number (9395841).

Almost surely, 2^73721061 is an apocalyptic number.

It is an amenable number.

73721061 is a deficient number, since it is larger than the sum of its proper divisors (39029031).

73721061 is a wasteful number, since it uses less digits than its factorization.

73721061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481860 (or 481857 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 73721061 is about 8586.0969596202. The cubic root of 73721061 is about 419.3054677674.

Adding to 73721061 its reverse (16012737), we get a palindrome (89733798).

The spelling of 73721061 in words is "seventy-three million, seven hundred twenty-one thousand, sixty-one".