3949091 has 4 divisors (see below), whose sum is σ = 4004784. Its totient is φ = 3893400.

The previous prime is 3949087. The next prime is 3949097. The reversal of 3949091 is 1909493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1909493 = 41 ⋅46573.

It is a cyclic number.

It is not a de Polignac number, because 3949091 - 2² = 3949087 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3949097) 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, 27740 + ... + 27881.

It is an arithmetic number, because the mean of its divisors is an integer number (1001196).

Almost surely, 2^3949091 is an apocalyptic number.

3949091 is a deficient number, since it is larger than the sum of its proper divisors (55693).

3949091 is an equidigital number, since it uses as much as digits as its factorization.

3949091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55692.

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

The square root of 3949091 is about 1987.2319945089. The cubic root of 3949091 is about 158.0637861346.

The spelling of 3949091 in words is "three million, nine hundred forty-nine thousand, ninety-one".