3639157 has 2 divisors, whose sum is σ = 3639158. Its totient is φ = 3639156.

The previous prime is 3639151. The next prime is 3639161. The reversal of 3639157 is 7519363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3129361 + 509796 = 1769^2 + 714^2 .

It is an emirp because it is prime and its reverse (7519363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3639157 - 2⁷ = 3639029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3639151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819578 + 1819579.

It is an arithmetic number, because the mean of its divisors is an integer number (1819579).

Almost surely, 2^3639157 is an apocalyptic number.

It is an amenable number.

3639157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3639157 is an equidigital number, since it uses as much as digits as its factorization.

3639157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 34.

The square root of 3639157 is about 1907.6574640118. The cubic root of 3639157 is about 153.8155575630.

It can be divided in two parts, 36 and 39157, that added together give a palindrome (39193).

The spelling of 3639157 in words is "three million, six hundred thirty-nine thousand, one hundred fifty-seven".