3651191 has 2 divisors, whose sum is σ = 3651192. Its totient is φ = 3651190.

The previous prime is 3651169. The next prime is 3651217. The reversal of 3651191 is 1911563.

It is an a-pointer prime, because the next prime (3651217) can be obtained adding 3651191 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3651191 - 2⁶ = 3651127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3651191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3651491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1825595 + 1825596.

It is an arithmetic number, because the mean of its divisors is an integer number (1825596).

Almost surely, 2^3651191 is an apocalyptic number.

3651191 is a deficient number, since it is larger than the sum of its proper divisors (1).

3651191 is an equidigital number, since it uses as much as digits as its factorization.

3651191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 26.

The square root of 3651191 is about 1910.8089909774. The cubic root of 3651191 is about 153.9849172837.

The spelling of 3651191 in words is "three million, six hundred fifty-one thousand, one hundred ninety-one".