3947667 has 4 divisors (see below), whose sum is σ = 5263560. Its totient is φ = 2631776.

The previous prime is 3947663. The next prime is 3947693. The reversal of 3947667 is 7667493.

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

It is a cyclic number.

It is not a de Polignac number, because 3947667 - 2² = 3947663 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3947663) 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, 657942 + ... + 657947.

It is an arithmetic number, because the mean of its divisors is an integer number (1315890).

Almost surely, 2^3947667 is an apocalyptic number.

3947667 is a deficient number, since it is larger than the sum of its proper divisors (1315893).

3947667 is a wasteful number, since it uses less digits than its factorization.

3947667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315892.

The product of its digits is 190512, while the sum is 42.

The square root of 3947667 is about 1986.8736748973. The cubic root of 3947667 is about 158.0447851467.

The spelling of 3947667 in words is "three million, nine hundred forty-seven thousand, six hundred sixty-seven".