3909899 has 8 divisors (see below), whose sum is σ = 4531968. Its totient is φ = 3303720.

The previous prime is 3909889. The next prime is 3909907. The reversal of 3909899 is 9989093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3909899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3909889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3437 + ... + 4430.

It is an arithmetic number, because the mean of its divisors is an integer number (566496).

Almost surely, 2^3909899 is an apocalyptic number.

3909899 is a deficient number, since it is larger than the sum of its proper divisors (622069).

3909899 is an equidigital number, since it uses as much as digits as its factorization.

3909899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 3909899 is about 1977.3464542159. The cubic root of 3909899 is about 157.5391554618.

The spelling of 3909899 in words is "three million, nine hundred nine thousand, eight hundred ninety-nine".