3691913 has 2 divisors, whose sum is σ = 3691914. Its totient is φ = 3691912.

The previous prime is 3691859. The next prime is 3691921. The reversal of 3691913 is 3191963.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2271049 + 1420864 = 1507^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 3691913 - 2⁸ = 3691657 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3691913.

It is not a weakly prime, because it can be changed into another prime (3691013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1845956 + 1845957.

It is an arithmetic number, because the mean of its divisors is an integer number (1845957).

Almost surely, 2^3691913 is an apocalyptic number.

It is an amenable number.

3691913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3691913 is an equidigital number, since it uses as much as digits as its factorization.

3691913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 32.

The square root of 3691913 is about 1921.4351407216. The cubic root of 3691913 is about 154.5552704576. Note that the first 3 decimals are identical.

The spelling of 3691913 in words is "three million, six hundred ninety-one thousand, nine hundred thirteen".