653143261 has 2 divisors, whose sum is σ = 653143262. Its totient is φ = 653143260.

The previous prime is 653143219. The next prime is 653143279. The reversal of 653143261 is 162341356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416568100 + 236575161 = 20410^2 + 15381^2 .

It is a cyclic number.

It is not a de Polignac number, because 653143261 - 2¹⁷ = 653012189 is a prime.

It is a super-2 number, since 2×653143261² = 853192238779428242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653140261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326571630 + 326571631.

It is an arithmetic number, because the mean of its divisors is an integer number (326571631).

Almost surely, 2^653143261 is an apocalyptic number.

It is an amenable number.

653143261 is a deficient number, since it is larger than the sum of its proper divisors (1).

653143261 is an equidigital number, since it uses as much as digits as its factorization.

653143261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 653143261 is about 25556.6676427112. The cubic root of 653143261 is about 867.6331762974.

The spelling of 653143261 in words is "six hundred fifty-three million, one hundred forty-three thousand, two hundred sixty-one".