207146047689 has 27 divisors (see below), whose sum is σ = 348077786823. Its totient is φ = 118363708512.

The previous prime is 207146047681. The next prime is 207146047709. The reversal of 207146047689 is 986740641702.

The square root of 207146047689 is 455133.

It is a perfect power (a square), and thus also a powerful number.

207146047689 is a `hidden beast` number, since 20 + 7 + 1 + 4 + 604 + 7 + 6 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 204706478025 + 2439569664 = 452445^2 + 49392^2 .

It is not a de Polignac number, because 207146047689 - 2³ = 207146047681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207146047681) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9546957 + ... + 9568629.

Almost surely, 2^207146047689 is an apocalyptic number.

207146047689 is the 455133-rd square number.

207146047689 is the 227567-th centered octagonal number.

It is an amenable number.

207146047689 is a deficient number, since it is larger than the sum of its proper divisors (140931739134).

207146047689 is an frugal number, since it uses more digits than its factorization.

207146047689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43366 (or 21683 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 207146047689 in words is "two hundred seven billion, one hundred forty-six million, forty-seven thousand, six hundred eighty-nine".