3639457 has 4 divisors (see below), whose sum is σ = 3708180. Its totient is φ = 3570736.

The previous prime is 3639421. The next prime is 3639473. The reversal of 3639457 is 7549363.

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 3326976 + 312481 = 1824^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 3639457 - 2¹⁵ = 3606689 is a prime.

It is a d-powerful number, because it can be written as 3⁴ + 6⁸ + 3⁸ + 9 + 4² + 5⁹ + 7² .

It is a Duffinian number.

3639457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3639407) 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, 34282 + ... + 34387.

It is an arithmetic number, because the mean of its divisors is an integer number (927045).

Almost surely, 2^3639457 is an apocalyptic number.

It is an amenable number.

3639457 is a deficient number, since it is larger than the sum of its proper divisors (68723).

3639457 is an equidigital number, since it uses as much as digits as its factorization.

3639457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68722.

The product of its digits is 68040, while the sum is 37.

The square root of 3639457 is about 1907.7360928598. The cubic root of 3639457 is about 153.8197841278.

It can be divided in two parts, 3639 and 457, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3639457 in words is "three million, six hundred thirty-nine thousand, four hundred fifty-seven".