647148957 has 32 divisors (see below), whose sum is σ = 1068576768. Its totient is φ = 339235776.

The previous prime is 647148941. The next prime is 647148959. The reversal of 647148957 is 759841746.

It is not a de Polignac number, because 647148957 - 2⁴ = 647148941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647148959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37228 + ... + 51770.

It is an arithmetic number, because the mean of its divisors is an integer number (33393024).

Almost surely, 2^647148957 is an apocalyptic number.

It is an amenable number.

647148957 is a deficient number, since it is larger than the sum of its proper divisors (421427811).

647148957 is a wasteful number, since it uses less digits than its factorization.

647148957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14729.

The product of its digits is 1693440, while the sum is 51.

The square root of 647148957 is about 25439.1225674157. The cubic root of 647148957 is about 864.9707439959.

The spelling of 647148957 in words is "six hundred forty-seven million, one hundred forty-eight thousand, nine hundred fifty-seven".