3891317 has 4 divisors (see below), whose sum is σ = 4120236. Its totient is φ = 3662400.

The previous prime is 3891287. The next prime is 3891323. The reversal of 3891317 is 7131983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3352561 + 538756 = 1831^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 3891317 - 2⁸ = 3891061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114434 + ... + 114467.

It is an arithmetic number, because the mean of its divisors is an integer number (1030059).

Almost surely, 2^3891317 is an apocalyptic number.

It is an amenable number.

3891317 is a deficient number, since it is larger than the sum of its proper divisors (228919).

3891317 is a wasteful number, since it uses less digits than its factorization.

3891317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228918.

The product of its digits is 4536, while the sum is 32.

The square root of 3891317 is about 1972.6421368307. The cubic root of 3891317 is about 157.2891880160.

The spelling of 3891317 in words is "three million, eight hundred ninety-one thousand, three hundred seventeen".