3640471 has 2 divisors, whose sum is σ = 3640472. Its totient is φ = 3640470.

The previous prime is 3640451. The next prime is 3640487. The reversal of 3640471 is 1740463.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3640471 - 2⁹ = 3639959 is a prime.

It is a super-3 number, since 3×3640471³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3640451) 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, 1820235 + 1820236.

It is an arithmetic number, because the mean of its divisors is an integer number (1820236).

Almost surely, 2^3640471 is an apocalyptic number.

3640471 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640471 is an equidigital number, since it uses as much as digits as its factorization.

3640471 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3640471 is about 1908.0018343807. The cubic root of 3640471 is about 153.8340681981.

The spelling of 3640471 in words is "three million, six hundred forty thousand, four hundred seventy-one".