3681506243 has 2 divisors, whose sum is σ = 3681506244. Its totient is φ = 3681506242.

The previous prime is 3681506197. The next prime is 3681506321. The reversal of 3681506243 is 3426051863.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3681506243 - 2²⁴ = 3664729027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3681506197 and 3681506206.

It is not a weakly prime, because it can be changed into another prime (3681566243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840753121 + 1840753122.

It is an arithmetic number, because the mean of its divisors is an integer number (1840753122).

Almost surely, 2^3681506243 is an apocalyptic number.

3681506243 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681506243 is an equidigital number, since it uses as much as digits as its factorization.

3681506243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 3681506243 is about 60675.4171225876. The cubic root of 3681506243 is about 1544.0991376550.

The spelling of 3681506243 in words is "three billion, six hundred eighty-one million, five hundred six thousand, two hundred forty-three".