3991094 has 4 divisors (see below), whose sum is σ = 5986644. Its totient is φ = 1995546.

The previous prime is 3991093. The next prime is 3991103. The reversal of 3991094 is 4901993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4901993 = 433 ⋅11321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997772 + ... + 997775.

It is an arithmetic number, because the mean of its divisors is an integer number (1496661).

Almost surely, 2^3991094 is an apocalyptic number.

3991094 is a deficient number, since it is larger than the sum of its proper divisors (1995550).

3991094 is a wasteful number, since it uses less digits than its factorization.

3991094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995549.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 3991094 is about 1997.7722592928. The cubic root of 3991094 is about 158.6222060379.

It can be divided in two parts, 39910 and 94, that added together give a palindrome (40004).

The spelling of 3991094 in words is "three million, nine hundred ninety-one thousand, ninety-four".