3947761 has 4 divisors (see below), whose sum is σ = 3953124. Its totient is φ = 3942400.

The previous prime is 3947759. The next prime is 3947771. The reversal of 3947761 is 1677493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1677493 = 701 ⋅2393.

It can be written as a sum of positive squares in 2 ways, for example, as 1874161 + 2073600 = 1369^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 3947761 - 2¹ = 3947759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3947761.

It is not an unprimeable number, because it can be changed into a prime (3947771) 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, 1360 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (988281).

Almost surely, 2^3947761 is an apocalyptic number.

It is an amenable number.

3947761 is a deficient number, since it is larger than the sum of its proper divisors (5363).

3947761 is an equidigital number, since it uses as much as digits as its factorization.

3947761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5362.

The product of its digits is 31752, while the sum is 37.

The square root of 3947761 is about 1986.8973300098. The cubic root of 3947761 is about 158.0460395662.

The spelling of 3947761 in words is "three million, nine hundred forty-seven thousand, seven hundred sixty-one".