3891427 has 6 divisors (see below), whose sum is σ = 3965964. Its totient is φ = 3817440.

The previous prime is 3891403. The next prime is 3891431. The reversal of 3891427 is 7241983.

It is a de Polignac number, because none of the positive numbers 2^k-3891427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3891392 and 3891401.

It is not an unprimeable number, because it can be changed into a prime (3891467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16027 + ... + 16267.

It is an arithmetic number, because the mean of its divisors is an integer number (660994).

Almost surely, 2^3891427 is an apocalyptic number.

3891427 is a deficient number, since it is larger than the sum of its proper divisors (74537).

3891427 is an frugal number, since it uses more digits than its factorization.

3891427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 308 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 3891427 is about 1972.6700180213. The cubic root of 3891427 is about 157.2906700891.

The spelling of 3891427 in words is "three million, eight hundred ninety-one thousand, four hundred twenty-seven".