647146172 has 6 divisors (see below), whose sum is σ = 1132505808. Its totient is φ = 323573084.

The previous prime is 647146139. The next prime is 647146183. The reversal of 647146172 is 271641746.

It is a happy number.

647146172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80893268 + ... + 80893275.

It is an arithmetic number, because the mean of its divisors is an integer number (188750968).

Almost surely, 2^647146172 is an apocalyptic number.

It is an amenable number.

647146172 is a deficient number, since it is larger than the sum of its proper divisors (485359636).

647146172 is a wasteful number, since it uses less digits than its factorization.

647146172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161786547 (or 161786545 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 647146172 is about 25439.0678288337. The cubic root of 647146172 is about 864.9695031960.

The spelling of 647146172 in words is "six hundred forty-seven million, one hundred forty-six thousand, one hundred seventy-two".