3947197 has 4 divisors (see below), whose sum is σ = 4053916. Its totient is φ = 3840480.

The previous prime is 3947189. The next prime is 3947227. The reversal of 3947197 is 7917493.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1572516 + 2374681 = 1254^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 3947197 - 2³ = 3947189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947147) 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, 53304 + ... + 53377.

It is an arithmetic number, because the mean of its divisors is an integer number (1013479).

Almost surely, 2^3947197 is an apocalyptic number.

3947197 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

3947197 is a deficient number, since it is larger than the sum of its proper divisors (106719).

3947197 is a wasteful number, since it uses less digits than its factorization.

3947197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106718.

The product of its digits is 47628, while the sum is 40.

The square root of 3947197 is about 1986.7553951103. The cubic root of 3947197 is about 158.0385127502.

The spelling of 3947197 in words is "three million, nine hundred forty-seven thousand, one hundred ninety-seven".