3891023 has 4 divisors (see below), whose sum is σ = 3985968. Its totient is φ = 3796080.

The previous prime is 3890981. The next prime is 3891037. The reversal of 3891023 is 3201983.

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 3891023 - 2¹⁴ = 3874639 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 3890983 and 3891001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891053) 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, 47411 + ... + 47492.

It is an arithmetic number, because the mean of its divisors is an integer number (996492).

Almost surely, 2^3891023 is an apocalyptic number.

3891023 is a deficient number, since it is larger than the sum of its proper divisors (94945).

3891023 is an equidigital number, since it uses as much as digits as its factorization.

3891023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94944.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 3891023 is about 1972.5676160781. The cubic root of 3891023 is about 157.2852267020.

The spelling of 3891023 in words is "three million, eight hundred ninety-one thousand, twenty-three".