648089623 has 4 divisors (see below), whose sum is σ = 686212560. Its totient is φ = 609966688.

The previous prime is 648089599. The next prime is 648089641. The reversal of 648089623 is 326980846.

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 648089623 - 2⁹ = 648089111 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 (648089683) 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, 19061443 + ... + 19061476.

It is an arithmetic number, because the mean of its divisors is an integer number (171553140).

Almost surely, 2^648089623 is an apocalyptic number.

648089623 is a deficient number, since it is larger than the sum of its proper divisors (38122937).

648089623 is a wasteful number, since it uses less digits than its factorization.

648089623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38122936.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 648089623 is about 25457.6044238259. The cubic root of 648089623 is about 865.3896350161.

The spelling of 648089623 in words is "six hundred forty-eight million, eighty-nine thousand, six hundred twenty-three".