3976813 has 4 divisors (see below), whose sum is σ = 3994560. Its totient is φ = 3959068.

The previous prime is 3976807. The next prime is 3976829. The reversal of 3976813 is 3186793.

3976813 = 2² + 3² + ... + 228².

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 3976813 - 2¹⁷ = 3845741 is a prime.

It is a Duffinian number.

3976813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3976853) 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, 8533 + ... + 8986.

It is an arithmetic number, because the mean of its divisors is an integer number (998640).

Almost surely, 2^3976813 is an apocalyptic number.

It is an amenable number.

3976813 is a deficient number, since it is larger than the sum of its proper divisors (17747).

3976813 is a wasteful number, since it uses less digits than its factorization.

3976813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17746.

The product of its digits is 27216, while the sum is 37.

The square root of 3976813 is about 1994.1948249858. The cubic root of 3976813 is about 158.4327850420.

The spelling of 3976813 in words is "three million, nine hundred seventy-six thousand, eight hundred thirteen".