3981313 has 8 divisors (see below), whose sum is σ = 4562432. Its totient is φ = 3403296.

The previous prime is 3981301. The next prime is 3981331. The reversal of 3981313 is 3131893.

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

It is a cyclic number.

It is not a de Polignac number, because 3981313 - 2¹⁷ = 3850241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3981343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3781 + ... + 4717.

It is an arithmetic number, because the mean of its divisors is an integer number (570304).

It is a Proth number, since it is equal to 243 ⋅ 2¹⁴ + 1 and 243 < 2¹⁴.

Almost surely, 2^3981313 is an apocalyptic number.

It is an amenable number.

3981313 is a deficient number, since it is larger than the sum of its proper divisors (581119).

3981313 is an equidigital number, since it uses as much as digits as its factorization.

3981313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551.

The product of its digits is 1944, while the sum is 28.

The square root of 3981313 is about 1995.3227809054. The cubic root of 3981313 is about 158.4925212166.

It can be divided in two parts, 398 and 1313, that added together give a triangular number (1711 = T₅₈).

The spelling of 3981313 in words is "three million, nine hundred eighty-one thousand, three hundred thirteen".