3651943 has 2 divisors, whose sum is σ = 3651944. Its totient is φ = 3651942.

The previous prime is 3651929. The next prime is 3651959. The reversal of 3651943 is 3491563.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3651943 - 2¹³ = 3643751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3651983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1825971 + 1825972.

It is an arithmetic number, because the mean of its divisors is an integer number (1825972).

Almost surely, 2^3651943 is an apocalyptic number.

3651943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3651943 is an equidigital number, since it uses as much as digits as its factorization.

3651943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 3651943 is about 1911.0057561399. The cubic root of 3651943 is about 153.9954881458.

Adding to 3651943 its product of digits (9720), we get a palindrome (3661663).

The spelling of 3651943 in words is "three million, six hundred fifty-one thousand, nine hundred forty-three".