72986841 has 6 divisors (see below), whose sum is σ = 105425450. Its totient is φ = 48657888.

The previous prime is 72986839. The next prime is 72986861. The reversal of 72986841 is 14868927.

It can be written as a sum of positive squares in only one way, i.e., 70913241 + 2073600 = 8421^2 + 1440^2 .

It is not a de Polignac number, because 72986841 - 2¹ = 72986839 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72986821) 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 5 ways as a sum of consecutive naturals, for example, 4054816 + ... + 4054833.

Almost surely, 2^72986841 is an apocalyptic number.

It is an amenable number.

72986841 is a deficient number, since it is larger than the sum of its proper divisors (32438609).

72986841 is a wasteful number, since it uses less digits than its factorization.

72986841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109655 (or 8109652 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 72986841 is about 8543.2336383831. The cubic root of 72986841 is about 417.9088058348.

The spelling of 72986841 in words is "seventy-two million, nine hundred eighty-six thousand, eight hundred forty-one".