647958 has 16 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 213096.

The previous prime is 647953. The next prime is 647963. The reversal of 647958 is 859746.

647958 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 (647953) and next prime (647963).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647951) by changing a digit.

647958 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2⁶⁴⁷⁹⁵⁸ is an apocalyptic number.

647958 is an abundant number, since it is smaller than the sum of its proper divisors (665322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647958 is a wasteful number, since it uses less digits than its factorization.

647958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451.

The product of its digits is 60480, while the sum is 39.

The square root of 647958 is about 804.9583840175. The cubic root of 647958 is about 86.5331045953.

The spelling of 647958 in words is "six hundred forty-seven thousand, nine hundred fifty-eight".