3681523 has 2 divisors, whose sum is σ = 3681524. Its totient is φ = 3681522.

The previous prime is 3681511. The next prime is 3681527. The reversal of 3681523 is 3251863.

It is a strong prime.

It is an emirp because it is prime and its reverse (3251863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3681523 - 2²¹ = 1584371 is a prime.

It is a super-2 number, since 2×3681523² = 27107223199058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3681491 and 3681500.

It is not a weakly prime, because it can be changed into another prime (3681527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840761 + 1840762.

It is an arithmetic number, because the mean of its divisors is an integer number (1840762).

Almost surely, 2^3681523 is an apocalyptic number.

3681523 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681523 is an equidigital number, since it uses as much as digits as its factorization.

3681523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 3681523 is about 1918.7295275781. The cubic root of 3681523 is about 154.4101480395.

It can be divided in two parts, 368 and 1523, that added together give a triangular number (1891 = T₆₁).

The spelling of 3681523 in words is "three million, six hundred eighty-one thousand, five hundred twenty-three".