3659391 has 8 divisors (see below), whose sum is σ = 5421360. Its totient is φ = 2439576.

The previous prime is 3659371. The next prime is 3659393. The reversal of 3659391 is 1939563.

It is not a de Polignac number, because 3659391 - 2¹¹ = 3657343 is a prime.

It is a super-2 number, since 2×3659391² = 26782284981762, which contains 22 as substring.

3659391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3659393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67740 + ... + 67793.

It is an arithmetic number, because the mean of its divisors is an integer number (677670).

Almost surely, 2^3659391 is an apocalyptic number.

3659391 is a deficient number, since it is larger than the sum of its proper divisors (1761969).

3659391 is a wasteful number, since it uses less digits than its factorization.

3659391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135542 (or 135536 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 3659391 is about 1912.9534756496. The cubic root of 3659391 is about 154.1001063861.

It can be divided in two parts, 365939 and 1, that added together give a triangular number (365940 = T₈₅₅).

The spelling of 3659391 in words is "three million, six hundred fifty-nine thousand, three hundred ninety-one".