3631399 has 4 divisors (see below), whose sum is σ = 3655600. Its totient is φ = 3607200.

The previous prime is 3631379. The next prime is 3631423. The reversal of 3631399 is 9931363.

It is a happy number.

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 3631399 - 2¹⁷ = 3500327 is a prime.

It is a Duffinian number.

3631399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631339) 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 in 3 ways as a sum of consecutive naturals, for example, 11874 + ... + 12175.

It is an arithmetic number, because the mean of its divisors is an integer number (913900).

Almost surely, 2^3631399 is an apocalyptic number.

3631399 is a deficient number, since it is larger than the sum of its proper divisors (24201).

3631399 is a wasteful number, since it uses less digits than its factorization.

3631399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24200.

The product of its digits is 13122, while the sum is 34.

The square root of 3631399 is about 1905.6229952433. The cubic root of 3631399 is about 153.7061778297.

The spelling of 3631399 in words is "three million, six hundred thirty-one thousand, three hundred ninety-nine".