3891471 has 4 divisors (see below), whose sum is σ = 5188632. Its totient is φ = 2594312.

The previous prime is 3891469. The next prime is 3891493. The reversal of 3891471 is 1741983.

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

It is a cyclic number.

It is not a de Polignac number, because 3891471 - 2¹ = 3891469 is a prime.

It is a super-3 number, since 3×3891471³ (a number of 21 digits) contains 333 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891431) 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, 648576 + ... + 648581.

It is an arithmetic number, because the mean of its divisors is an integer number (1297158).

Almost surely, 2^3891471 is an apocalyptic number.

3891471 is a deficient number, since it is larger than the sum of its proper divisors (1297161).

3891471 is a wasteful number, since it uses less digits than its factorization.

3891471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297160.

The product of its digits is 6048, while the sum is 33.

The square root of 3891471 is about 1972.6811703871. The cubic root of 3891471 is about 157.2912629104.

The spelling of 3891471 in words is "three million, eight hundred ninety-one thousand, four hundred seventy-one".