647399133 has 12 divisors (see below), whose sum is σ = 965298048. Its totient is φ = 417676680.

The previous prime is 647399111. The next prime is 647399149. The reversal of 647399133 is 331993746.

It is a happy number.

It is not a de Polignac number, because 647399133 - 2⁸ = 647398877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647399633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1159935 + ... + 1160492.

It is an arithmetic number, because the mean of its divisors is an integer number (80441504).

Almost surely, 2^647399133 is an apocalyptic number.

It is an amenable number.

647399133 is a deficient number, since it is larger than the sum of its proper divisors (317898915).

647399133 is a wasteful number, since it uses less digits than its factorization.

647399133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320464 (or 2320461 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 647399133 is about 25444.0392430133. The cubic root of 647399133 is about 865.0821902813.

The spelling of 647399133 in words is "six hundred forty-seven million, three hundred ninety-nine thousand, one hundred thirty-three".