653164991 has 2 divisors, whose sum is σ = 653164992. Its totient is φ = 653164990.

The previous prime is 653164979. The next prime is 653165027. The reversal of 653164991 is 199461356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653164991 - 2⁶ = 653164927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653164901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326582495 + 326582496.

It is an arithmetic number, because the mean of its divisors is an integer number (326582496).

Almost surely, 2^653164991 is an apocalyptic number.

653164991 is a deficient number, since it is larger than the sum of its proper divisors (1).

653164991 is an equidigital number, since it uses as much as digits as its factorization.

653164991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 653164991 is about 25557.0927728488. The cubic root of 653164991 is about 867.6427982088.

It can be divided in two parts, 65316 and 4991, that added together give a palindrome (70307).

The spelling of 653164991 in words is "six hundred fifty-three million, one hundred sixty-four thousand, nine hundred ninety-one".