3947313 has 4 divisors (see below), whose sum is σ = 5263088. Its totient is φ = 2631540.

The previous prime is 3947311. The next prime is 3947327. The reversal of 3947313 is 3137493.

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 not a de Polignac number, because 3947313 - 2¹ = 3947311 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3947311) 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, 657883 + ... + 657888.

It is an arithmetic number, because the mean of its divisors is an integer number (1315772).

Almost surely, 2^3947313 is an apocalyptic number.

It is an amenable number.

3947313 is a deficient number, since it is larger than the sum of its proper divisors (1315775).

3947313 is a wasteful number, since it uses less digits than its factorization.

3947313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315774.

The product of its digits is 6804, while the sum is 30.

The square root of 3947313 is about 1986.7845882229. The cubic root of 3947313 is about 158.0400608773.

The spelling of 3947313 in words is "three million, nine hundred forty-seven thousand, three hundred thirteen".