3637729 has 4 divisors (see below), whose sum is σ = 3736084. Its totient is φ = 3539376.

The previous prime is 3637723. The next prime is 3637771. The reversal of 3637729 is 9277363.

3637729 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 2739025 + 898704 = 1655^2 + 948^2 .

It is a cyclic number.

It is not a de Polignac number, because 3637729 - 2⁹ = 3637217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 98317 = 3637729 / (3 + 6 + 3 + 7 + 7 + 2 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3637723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49122 + ... + 49195.

It is an arithmetic number, because the mean of its divisors is an integer number (934021).

Almost surely, 2^3637729 is an apocalyptic number.

It is an amenable number.

3637729 is a deficient number, since it is larger than the sum of its proper divisors (98355).

3637729 is an equidigital number, since it uses as much as digits as its factorization.

3637729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98354.

The product of its digits is 47628, while the sum is 37.

The square root of 3637729 is about 1907.2831462580. The cubic root of 3637729 is about 153.7954359293.

The spelling of 3637729 in words is "three million, six hundred thirty-seven thousand, seven hundred twenty-nine".