3900291 has 4 divisors (see below), whose sum is σ = 5200392. Its totient is φ = 2600192.

The previous prime is 3900287. The next prime is 3900307. The reversal of 3900291 is 1920093.

It is a happy number.

3900291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3900291 - 2² = 3900287 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3900691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650046 + ... + 650051.

It is an arithmetic number, because the mean of its divisors is an integer number (1300098).

Almost surely, 2^3900291 is an apocalyptic number.

3900291 is a deficient number, since it is larger than the sum of its proper divisors (1300101).

3900291 is a wasteful number, since it uses less digits than its factorization.

3900291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300100.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 3900291 is about 1974.9154412278. The cubic root of 3900291 is about 157.4100065378.

It can be divided in two parts, 39002 and 91, that added together give a palindrome (39093).

The spelling of 3900291 in words is "three million, nine hundred thousand, two hundred ninety-one".