648311447 has 16 divisors (see below), whose sum is σ = 761935872. Its totient is φ = 539978400.

The previous prime is 648311441. The next prime is 648311453. The reversal of 648311447 is 744113846.

It is a happy number.

648311447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (648311441) and next prime (648311453).

It is a cyclic number.

It is not a de Polignac number, because 648311447 - 2⁶ = 648311383 is a prime.

It is a super-2 number, since 2×648311447² = 840615464622467618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648311447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648311441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331322 + ... + 333272.

It is an arithmetic number, because the mean of its divisors is an integer number (47620992).

Almost surely, 2^648311447 is an apocalyptic number.

648311447 is a deficient number, since it is larger than the sum of its proper divisors (113624425).

648311447 is a wasteful number, since it uses less digits than its factorization.

648311447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278.

The product of its digits is 64512, while the sum is 38.

The square root of 648311447 is about 25461.9607846686. The cubic root of 648311447 is about 865.4883571096.

The spelling of 648311447 in words is "six hundred forty-eight million, three hundred eleven thousand, four hundred forty-seven".