36682721 has 4 divisors (see below), whose sum is σ = 36808212. Its totient is φ = 36557232.

The previous prime is 36682717. The next prime is 36682733. The reversal of 36682721 is 12728663.

It is a happy number.

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 22515025 + 14167696 = 4745^2 + 3764^2 .

It is a cyclic number.

It is not a de Polignac number, because 36682721 - 2² = 36682717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36682771) 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, 62306 + ... + 62891.

It is an arithmetic number, because the mean of its divisors is an integer number (9202053).

Almost surely, 2^36682721 is an apocalyptic number.

It is an amenable number.

36682721 is a deficient number, since it is larger than the sum of its proper divisors (125491).

36682721 is a wasteful number, since it uses less digits than its factorization.

36682721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125490.

The product of its digits is 24192, while the sum is 35.

The square root of 36682721 is about 6056.6262060656. The cubic root of 36682721 is about 332.2669775157.

The spelling of 36682721 in words is "thirty-six million, six hundred eighty-two thousand, seven hundred twenty-one".