653391 has 12 divisors (see below), whose sum is σ = 993720. Its totient is φ = 412560.

The previous prime is 653363. The next prime is 653431. The reversal of 653391 is 193356.

653391 is a `hidden beast` number, since 653 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 653391 - 2¹⁵ = 620623 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653391.

It is not an unprimeable number, because it can be changed into a prime (653311) 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, 1740 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (82810).

2⁶⁵³³⁹¹ is an apocalyptic number.

653391 is a deficient number, since it is larger than the sum of its proper divisors (340329).

653391 is a wasteful number, since it uses less digits than its factorization.

653391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846 (or 3843 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 653391 is about 808.3260480771. The cubic root of 653391 is about 86.7742860965.

The spelling of 653391 in words is "six hundred fifty-three thousand, three hundred ninety-one".