3658891 has 2 divisors, whose sum is σ = 3658892. Its totient is φ = 3658890.

The previous prime is 3658877. The next prime is 3658943. The reversal of 3658891 is 1988563.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1988563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3658891 - 2¹¹ = 3656843 is a prime.

It is not a weakly prime, because it can be changed into another prime (3658801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1829445 + 1829446.

It is an arithmetic number, because the mean of its divisors is an integer number (1829446).

Almost surely, 2^3658891 is an apocalyptic number.

3658891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3658891 is an equidigital number, since it uses as much as digits as its factorization.

3658891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 3658891 is about 1912.8227832186. The cubic root of 3658891 is about 154.0930875896.

The spelling of 3658891 in words is "three million, six hundred fifty-eight thousand, eight hundred ninety-one".