647850623 has 4 divisors (see below), whose sum is σ = 740400720. Its totient is φ = 555300528.

The previous prime is 647850587. The next prime is 647850629. The reversal of 647850623 is 326058746.

It is a happy number.

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 647850623 - 2¹⁸ = 647588479 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 (647850629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46275038 + ... + 46275051.

It is an arithmetic number, because the mean of its divisors is an integer number (185100180).

Almost surely, 2^647850623 is an apocalyptic number.

647850623 is a deficient number, since it is larger than the sum of its proper divisors (92550097).

647850623 is an equidigital number, since it uses as much as digits as its factorization.

647850623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92550096.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 647850623 is about 25452.9099122281. The cubic root of 647850623 is about 865.2832435824.

The spelling of 647850623 in words is "six hundred forty-seven million, eight hundred fifty thousand, six hundred twenty-three".