647117683 has 2 divisors, whose sum is σ = 647117684. Its totient is φ = 647117682.

The previous prime is 647117663. The next prime is 647117701. The reversal of 647117683 is 386711746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647117683 is a prime.

It is a super-2 number, since 2×647117683² = 837522591302576978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (647117663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323558841 + 323558842.

It is an arithmetic number, because the mean of its divisors is an integer number (323558842).

Almost surely, 2^647117683 is an apocalyptic number.

647117683 is a deficient number, since it is larger than the sum of its proper divisors (1).

647117683 is an equidigital number, since it uses as much as digits as its factorization.

647117683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 647117683 is about 25438.5078768390. The cubic root of 647117683 is about 864.9568102997.

The spelling of 647117683 in words is "six hundred forty-seven million, one hundred seventeen thousand, six hundred eighty-three".