47197665 has 12 divisors (see below), whose sum is σ = 81809364. Its totient is φ = 25172064.

The previous prime is 47197649. The next prime is 47197673. The reversal of 47197665 is 56679174.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 25070049 = 4704^2 + 5007^2 .

It is not a de Polignac number, because 47197665 - 2⁴ = 47197649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1048837 = 47197665 / (4 + 7 + 1 + 9 + 7 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 47197665.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 524374 + ... + 524463.

It is an arithmetic number, because the mean of its divisors is an integer number (6817447).

Almost surely, 2^47197665 is an apocalyptic number.

47197665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47197665 is a deficient number, since it is larger than the sum of its proper divisors (34611699).

47197665 is a wasteful number, since it uses less digits than its factorization.

47197665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048848 (or 1048845 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 47197665 is about 6870.0556766303. The cubic root of 47197665 is about 361.3878143418.

The spelling of 47197665 in words is "forty-seven million, one hundred ninety-seven thousand, six hundred sixty-five".