36493721 has 6 divisors (see below), whose sum is σ = 40113066. Its totient is φ = 33176000.

The previous prime is 36493711. The next prime is 36493739. The reversal of 36493721 is 12739463.

36493721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 34633225 + 1860496 = 5885^2 + 1364^2 .

It is a de Polignac number, because none of the positive numbers 2^k-36493721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36493711) 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, 150680 + ... + 150921.

It is an arithmetic number, because the mean of its divisors is an integer number (6685511).

Almost surely, 2^36493721 is an apocalyptic number.

It is an amenable number.

36493721 is a deficient number, since it is larger than the sum of its proper divisors (3619345).

36493721 is a wasteful number, since it uses less digits than its factorization.

36493721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301623 (or 301612 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 36493721 is about 6041.0033107092. The cubic root of 36493721 is about 331.6953494325.

The spelling of 36493721 in words is "thirty-six million, four hundred ninety-three thousand, seven hundred twenty-one".