3661913 has 2 divisors, whose sum is σ = 3661914. Its totient is φ = 3661912.

The previous prime is 3661909. The next prime is 3661943. The reversal of 3661913 is 3191663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2866249 + 795664 = 1693^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661913 - 2² = 3661909 is a prime.

It is not a weakly prime, because it can be changed into another prime (3661943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830956 + 1830957.

It is an arithmetic number, because the mean of its divisors is an integer number (1830957).

Almost surely, 2^3661913 is an apocalyptic number.

It is an amenable number.

3661913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661913 is an equidigital number, since it uses as much as digits as its factorization.

3661913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 3661913 is about 1913.6125522164. The cubic root of 3661913 is about 154.1354994539.

The spelling of 3661913 in words is "three million, six hundred sixty-one thousand, nine hundred thirteen".