3906289 has 4 divisors (see below), whose sum is σ = 3936240. Its totient is φ = 3876340.

The previous prime is 3906283. The next prime is 3906293. The reversal of 3906289 is 9826093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3906289 - 2⁹ = 3905777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906283) 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, 14779 + ... + 15040.

It is an arithmetic number, because the mean of its divisors is an integer number (984060).

Almost surely, 2^3906289 is an apocalyptic number.

It is an amenable number.

3906289 is a deficient number, since it is larger than the sum of its proper divisors (29951).

3906289 is a wasteful number, since it uses less digits than its factorization.

3906289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29950.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 3906289 is about 1976.4334038869. The cubic root of 3906289 is about 157.4906553623.

The spelling of 3906289 in words is "three million, nine hundred six thousand, two hundred eighty-nine".