3891273 has 4 divisors (see below), whose sum is σ = 5188368. Its totient is φ = 2594180.

The previous prime is 3891263. The next prime is 3891287. The reversal of 3891273 is 3721983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3891273 - 2⁵ = 3891241 is a prime.

It is a D-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 3 ways as a sum of consecutive naturals, for example, 648543 + ... + 648548.

It is an arithmetic number, because the mean of its divisors is an integer number (1297092).

Almost surely, 2^3891273 is an apocalyptic number.

It is an amenable number.

3891273 is a deficient number, since it is larger than the sum of its proper divisors (1297095).

3891273 is a wasteful number, since it uses less digits than its factorization.

3891273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297094.

The product of its digits is 9072, while the sum is 33.

The square root of 3891273 is about 1972.6309842441. The cubic root of 3891273 is about 157.2885951790.

The spelling of 3891273 in words is "three million, eight hundred ninety-one thousand, two hundred seventy-three".