3947198247 has 12 divisors (see below), whose sum is σ = 5702460504. Its totient is φ = 2631026160.

The previous prime is 3947198237. The next prime is 3947198293. The reversal of 3947198247 is 7428917493.

3947198247 is a `hidden beast` number, since 394 + 7 + 1 + 9 + 8 + 247 = 666.

It is not a de Polignac number, because 3947198247 - 2⁴ = 3947198231 is a prime.

It is a super-3 number, since 3×3947198247³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 3947198193 and 3947198202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947198237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25908 + ... + 92550.

It is an arithmetic number, because the mean of its divisors is an integer number (475205042).

Almost surely, 2^3947198247 is an apocalyptic number.

3947198247 is a deficient number, since it is larger than the sum of its proper divisors (1755262257).

3947198247 is a wasteful number, since it uses less digits than its factorization.

3947198247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73230 (or 73227 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 3947198247 is about 62826.7319458843. The cubic root of 3947198247 is about 1580.3852939277.

The spelling of 3947198247 in words is "three billion, nine hundred forty-seven million, one hundred ninety-eight thousand, two hundred forty-seven".