653947 has 8 divisors (see below), whose sum is σ = 755456. Its totient is φ = 554472.

The previous prime is 653941. The next prime is 653951. The reversal of 653947 is 749356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 653947 - 2⁷ = 653819 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (653941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268 + ... + 1174.

It is an arithmetic number, because the mean of its divisors is an integer number (94432).

2⁶⁵³⁹⁴⁷ is an apocalyptic number.

653947 is a deficient number, since it is larger than the sum of its proper divisors (101509).

653947 is a wasteful number, since it uses less digits than its factorization.

653947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its digits is 22680, while the sum is 34.

The square root of 653947 is about 808.6698955693. The cubic root of 653947 is about 86.7988925085.

It can be divided in two parts, 653 and 947, that added together give a square (1600 = 40²).

The spelling of 653947 in words is "six hundred fifty-three thousand, nine hundred forty-seven".