3681511 has 2 divisors, whose sum is σ = 3681512. Its totient is φ = 3681510.

The previous prime is 3681499. The next prime is 3681523. The reversal of 3681511 is 1151863.

It is a balanced prime because it is at equal distance from previous prime (3681499) and next prime (3681523).

It is a cyclic number.

It is not a de Polignac number, because 3681511 - 2¹⁷ = 3550439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840755 + 1840756.

It is an arithmetic number, because the mean of its divisors is an integer number (1840756).

Almost surely, 2^3681511 is an apocalyptic number.

3681511 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681511 is an equidigital number, since it uses as much as digits as its factorization.

3681511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 3681511 is about 1918.7264005063. The cubic root of 3681511 is about 154.4099802716.

The spelling of 3681511 in words is "three million, six hundred eighty-one thousand, five hundred eleven".