3608639 has 2 divisors, whose sum is σ = 3608640. Its totient is φ = 3608638.

The previous prime is 3608621. The next prime is 3608653. The reversal of 3608639 is 9368063.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3608639 - 2¹² = 3604543 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3608599 and 3608608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3608669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804319 + 1804320.

It is an arithmetic number, because the mean of its divisors is an integer number (1804320).

Almost surely, 2^3608639 is an apocalyptic number.

3608639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3608639 is an equidigital number, since it uses as much as digits as its factorization.

3608639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3608639 is about 1899.6418083418. The cubic root of 3608639 is about 153.3843838626.

The spelling of 3608639 in words is "three million, six hundred eight thousand, six hundred thirty-nine".