3990313 has 4 divisors (see below), whose sum is σ = 4127940. Its totient is φ = 3852688.

The previous prime is 3990307. The next prime is 3990331. The reversal of 3990313 is 3130993.

3990313 = 1412² + 1413².

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1996569 + 1993744 = 1413^2 + 1412^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990313 - 2⁵ = 3990281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990353) 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, 68770 + ... + 68827.

It is an arithmetic number, because the mean of its divisors is an integer number (1031985).

Almost surely, 2^3990313 is an apocalyptic number.

3990313 is the 1413-rd centered square number.

It is an amenable number.

3990313 is a deficient number, since it is larger than the sum of its proper divisors (137627).

3990313 is a wasteful number, since it uses less digits than its factorization.

3990313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137626.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 3990313 is about 1997.5767820036. The cubic root of 3990313 is about 158.6118586641.

The spelling of 3990313 in words is "three million, nine hundred ninety thousand, three hundred thirteen".