653881 has 2 divisors, whose sum is σ = 653882. Its totient is φ = 653880.

The previous prime is 653879. The next prime is 653893. The reversal of 653881 is 188356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477481 + 176400 = 691^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 653881 - 2¹ = 653879 is a prime.

It is a super-2 number, since 2×653881² = 855120724322, which contains 22 as substring.

Together with 653879, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326940 + 326941.

It is an arithmetic number, because the mean of its divisors is an integer number (326941).

2⁶⁵³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

653881 is a deficient number, since it is larger than the sum of its proper divisors (1).

653881 is an equidigital number, since it uses as much as digits as its factorization.

653881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 653881 is about 808.6290867883. The cubic root of 653881 is about 86.7959723332.

The spelling of 653881 in words is "six hundred fifty-three thousand, eight hundred eighty-one".