647070869 has 8 divisors (see below), whose sum is σ = 651104160. Its totient is φ = 643050576.

The previous prime is 647070841. The next prime is 647070871. The reversal of 647070869 is 968070746.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647070869 is a prime.

It is a super-2 number, since 2×647070869² = 837401419016830322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647070839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108134 + ... + 113960.

It is an arithmetic number, because the mean of its divisors is an integer number (81388020).

Almost surely, 2^647070869 is an apocalyptic number.

It is an amenable number.

647070869 is a deficient number, since it is larger than the sum of its proper divisors (4033291).

647070869 is a wasteful number, since it uses less digits than its factorization.

647070869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 647070869 is about 25437.5877197505. The cubic root of 647070869 is about 864.9359521335.

The spelling of 647070869 in words is "six hundred forty-seven million, seventy thousand, eight hundred sixty-nine".