653503261 has 2 divisors, whose sum is σ = 653503262. Its totient is φ = 653503260.

The previous prime is 653503199. The next prime is 653503267. The reversal of 653503261 is 162305356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407797636 + 245705625 = 20194^2 + 15675^2 .

It is a cyclic number.

It is not a de Polignac number, because 653503261 - 2¹⁷ = 653372189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653503267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326751630 + 326751631.

It is an arithmetic number, because the mean of its divisors is an integer number (326751631).

Almost surely, 2^653503261 is an apocalyptic number.

It is an amenable number.

653503261 is a deficient number, since it is larger than the sum of its proper divisors (1).

653503261 is an equidigital number, since it uses as much as digits as its factorization.

653503261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 653503261 is about 25563.7098442304. The cubic root of 653503261 is about 867.7925545905.

The spelling of 653503261 in words is "six hundred fifty-three million, five hundred three thousand, two hundred sixty-one".