653491 has 2 divisors, whose sum is σ = 653492. Its totient is φ = 653490.

The previous prime is 653473. The next prime is 653501. The reversal of 653491 is 194356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 653491 - 2⁷ = 653363 is a prime.

It is not a weakly prime, because it can be changed into another prime (653431) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326745 + 326746.

It is an arithmetic number, because the mean of its divisors is an integer number (326746).

2⁶⁵³⁴⁹¹ is an apocalyptic number.

653491 is a deficient number, since it is larger than the sum of its proper divisors (1).

653491 is an equidigital number, since it uses as much as digits as its factorization.

653491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 653491 is about 808.3879019382. The cubic root of 653491 is about 86.7787127394.

The spelling of 653491 in words is "six hundred fifty-three thousand, four hundred ninety-one".