647423935 has 4 divisors (see below), whose sum is σ = 776908728. Its totient is φ = 517939144.

The previous prime is 647423899. The next prime is 647423951. The reversal of 647423935 is 539324746.

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 647423935 - 2¹⁵ = 647391167 is a prime.

It is a super-2 number, since 2×647423935² = 838315503221768450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647423891 and 647423900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64742389 + ... + 64742398.

It is an arithmetic number, because the mean of its divisors is an integer number (194227182).

Almost surely, 2^647423935 is an apocalyptic number.

647423935 is a deficient number, since it is larger than the sum of its proper divisors (129484793).

647423935 is a wasteful number, since it uses less digits than its factorization.

647423935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129484792.

The product of its digits is 544320, while the sum is 43.

The square root of 647423935 is about 25444.5266216528. The cubic root of 647423935 is about 865.0932373018.

The spelling of 647423935 in words is "six hundred forty-seven million, four hundred twenty-three thousand, nine hundred thirty-five".