3622991 has 2 divisors, whose sum is σ = 3622992. Its totient is φ = 3622990.

The previous prime is 3622987. The next prime is 3623017. The reversal of 3622991 is 1992263.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3622991 - 2² = 3622987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3622951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1811495 + 1811496.

It is an arithmetic number, because the mean of its divisors is an integer number (1811496).

Almost surely, 2^3622991 is an apocalyptic number.

3622991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3622991 is an equidigital number, since it uses as much as digits as its factorization.

3622991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 3622991 is about 1903.4156141001. The cubic root of 3622991 is about 153.5874577206.

The spelling of 3622991 in words is "three million, six hundred twenty-two thousand, nine hundred ninety-one".