3662891 has 4 divisors (see below), whose sum is σ = 3690984. Its totient is φ = 3634800.

The previous prime is 3662887. The next prime is 3662909. The reversal of 3662891 is 1982663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1982663 = 79 ⋅25097.

It is a cyclic number.

It is not a de Polignac number, because 3662891 - 2² = 3662887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3662831) 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 in 3 ways as a sum of consecutive naturals, for example, 13850 + ... + 14111.

It is an arithmetic number, because the mean of its divisors is an integer number (922746).

Almost surely, 2^3662891 is an apocalyptic number.

3662891 is a deficient number, since it is larger than the sum of its proper divisors (28093).

3662891 is a wasteful number, since it uses less digits than its factorization.

3662891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28092.

The product of its digits is 15552, while the sum is 35.

The square root of 3662891 is about 1913.8680727783. The cubic root of 3662891 is about 154.1492200694.

The spelling of 3662891 in words is "three million, six hundred sixty-two thousand, eight hundred ninety-one".