3581667 has 6 divisors (see below), whose sum is σ = 5173532. Its totient is φ = 2387772.

The previous prime is 3581663. The next prime is 3581681. The reversal of 3581667 is 7661853.

It is not a de Polignac number, because 3581667 - 2² = 3581663 is a prime.

It is a Duffinian number.

3581667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3581663) 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 5 ways as a sum of consecutive naturals, for example, 198973 + ... + 198990.

Almost surely, 2^3581667 is an apocalyptic number.

3581667 is a deficient number, since it is larger than the sum of its proper divisors (1591865).

3581667 is a wasteful number, since it uses less digits than its factorization.

3581667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397969 (or 397966 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3581667 is about 1892.5292600116. The cubic root of 3581667 is about 153.0012815476.

It can be divided in two parts, 358 and 1667, that added together give a square (2025 = 45²).

The spelling of 3581667 in words is "three million, five hundred eighty-one thousand, six hundred sixty-seven".