647012423 has 4 divisors (see below), whose sum is σ = 649914048. Its totient is φ = 644110800.

The previous prime is 647012389. The next prime is 647012437. The reversal of 647012423 is 324210746.

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 647012423 - 2⁸ = 647012167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647012323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450478 + ... + 1450923.

It is an arithmetic number, because the mean of its divisors is an integer number (162478512).

Almost surely, 2^647012423 is an apocalyptic number.

647012423 is a deficient number, since it is larger than the sum of its proper divisors (2901625).

647012423 is a wasteful number, since it uses less digits than its factorization.

647012423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901624.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 647012423 is about 25436.4388820448. The cubic root of 647012423 is about 864.9099098707.

The spelling of 647012423 in words is "six hundred forty-seven million, twelve thousand, four hundred twenty-three".