647375147 has 4 divisors (see below), whose sum is σ = 685456056. Its totient is φ = 609294240.

The previous prime is 647375143. The next prime is 647375161. The reversal of 647375147 is 741573746.

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 647375147 - 2² = 647375143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647375098 and 647375107.

It is not an unprimeable number, because it can be changed into a prime (647375143) 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, 19040429 + ... + 19040462.

It is an arithmetic number, because the mean of its divisors is an integer number (171364014).

Almost surely, 2^647375147 is an apocalyptic number.

647375147 is a deficient number, since it is larger than the sum of its proper divisors (38080909).

647375147 is a wasteful number, since it uses less digits than its factorization.

647375147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38080908.

The product of its digits is 493920, while the sum is 44.

The square root of 647375147 is about 25443.5678905298. The cubic root of 647375147 is about 865.0715064457.

The spelling of 647375147 in words is "six hundred forty-seven million, three hundred seventy-five thousand, one hundred forty-seven".