653512991 has 2 divisors, whose sum is σ = 653512992. Its totient is φ = 653512990.

The previous prime is 653512973. The next prime is 653513017. The reversal of 653512991 is 199215356.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653512991 - 2¹⁰ = 653511967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653512921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326756495 + 326756496.

It is an arithmetic number, because the mean of its divisors is an integer number (326756496).

Almost surely, 2^653512991 is an apocalyptic number.

653512991 is a deficient number, since it is larger than the sum of its proper divisors (1).

653512991 is an equidigital number, since it uses as much as digits as its factorization.

653512991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 41.

The square root of 653512991 is about 25563.9001523633. The cubic root of 653512991 is about 867.7968614192.

The spelling of 653512991 in words is "six hundred fifty-three million, five hundred twelve thousand, nine hundred ninety-one".