3891207 has 8 divisors (see below), whose sum is σ = 5286384. Its totient is φ = 2545088.

The previous prime is 3891203. The next prime is 3891229. The reversal of 3891207 is 7021983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3891207 - 2² = 3891203 is a prime.

3891207 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12078 + ... + 12395.

It is an arithmetic number, because the mean of its divisors is an integer number (660798).

Almost surely, 2^3891207 is an apocalyptic number.

3891207 is a deficient number, since it is larger than the sum of its proper divisors (1395177).

3891207 is a wasteful number, since it uses less digits than its factorization.

3891207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24529.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3891207 is about 1972.6142552461. The cubic root of 3891207 is about 157.2877059151.

It can be divided in two parts, 389 and 1207, that added together give a triangular number (1596 = T₅₆).

The spelling of 3891207 in words is "three million, eight hundred ninety-one thousand, two hundred seven".