647670023 has 48 divisors (see below), whose sum is σ = 887956992. Its totient is φ = 458640000.

The previous prime is 647670019. The next prime is 647670047. The reversal of 647670023 is 320076746.

It is not a de Polignac number, because 647670023 - 2² = 647670019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647670013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 923573 + ... + 924273.

It is an arithmetic number, because the mean of its divisors is an integer number (18499104).

Almost surely, 2^647670023 is an apocalyptic number.

647670023 is a deficient number, since it is larger than the sum of its proper divisors (240286969).

647670023 is a wasteful number, since it uses less digits than its factorization.

647670023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 647670023 is about 25449.3619369917. The cubic root of 647670023 is about 865.2028316935.

The spelling of 647670023 in words is "six hundred forty-seven million, six hundred seventy thousand, twenty-three".