647713623 has 8 divisors (see below), whose sum is σ = 878256000. Its totient is φ = 424490168.

The previous prime is 647713621. The next prime is 647713631. The reversal of 647713623 is 326317746.

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

It is a cyclic number.

It is not a de Polignac number, because 647713623 - 2¹ = 647713621 is a prime.

It is a super-2 number, since 2×647713623² = 839065874839572258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647713621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829523 + ... + 1829876.

It is an arithmetic number, because the mean of its divisors is an integer number (109782000).

Almost surely, 2^647713623 is an apocalyptic number.

647713623 is a deficient number, since it is larger than the sum of its proper divisors (230542377).

647713623 is a wasteful number, since it uses less digits than its factorization.

647713623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659461.

The product of its digits is 127008, while the sum is 39.

The square root of 647713623 is about 25450.2185255844. The cubic root of 647713623 is about 865.2222458991. Note that the first 4 decimals are identical.

It can be divided in two parts, 6477 and 13623, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 647713623 in words is "six hundred forty-seven million, seven hundred thirteen thousand, six hundred twenty-three".