3640147 has 4 divisors (see below), whose sum is σ = 4160176. Its totient is φ = 3120120.

The previous prime is 3640121. The next prime is 3640151. The reversal of 3640147 is 7410463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3640147 - 2⁷ = 3640019 is a prime.

It is an Ulam number.

It is a Duffinian number.

3640147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3640447) 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 3 ways as a sum of consecutive naturals, for example, 260004 + ... + 260017.

It is an arithmetic number, because the mean of its divisors is an integer number (1040044).

Almost surely, 2^3640147 is an apocalyptic number.

3640147 is a deficient number, since it is larger than the sum of its proper divisors (520029).

3640147 is an equidigital number, since it uses as much as digits as its factorization.

3640147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520028.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 3640147 is about 1907.9169269127. The cubic root of 3640147 is about 153.8295043457.

The spelling of 3640147 in words is "three million, six hundred forty thousand, one hundred forty-seven".