3640487 has 2 divisors, whose sum is σ = 3640488. Its totient is φ = 3640486.

The previous prime is 3640471. The next prime is 3640493. The reversal of 3640487 is 7840463.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3640487 - 2⁴ = 3640471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 1820243 + 1820244.

It is an arithmetic number, because the mean of its divisors is an integer number (1820244).

Almost surely, 2^3640487 is an apocalyptic number.

3640487 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640487 is an equidigital number, since it uses as much as digits as its factorization.

3640487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3640487 is about 1908.0060272441. The cubic root of 3640487 is about 153.8342935665.

The spelling of 3640487 in words is "three million, six hundred forty thousand, four hundred eighty-seven".