653996257 has 2 divisors, whose sum is σ = 653996258. Its totient is φ = 653996256.

The previous prime is 653996221. The next prime is 653996263. The reversal of 653996257 is 752699356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628956241 + 25040016 = 25079^2 + 5004^2 .

It is a cyclic number.

It is not a de Polignac number, because 653996257 - 2⁷ = 653996129 is a prime.

It is a super-2 number, since 2×653996257² = 855422208340020098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (653996557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326998128 + 326998129.

It is an arithmetic number, because the mean of its divisors is an integer number (326998129).

Almost surely, 2^653996257 is an apocalyptic number.

It is an amenable number.

653996257 is a deficient number, since it is larger than the sum of its proper divisors (1).

653996257 is an equidigital number, since it uses as much as digits as its factorization.

653996257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3061800, while the sum is 52.

The square root of 653996257 is about 25573.3505235431. The cubic root of 653996257 is about 868.0107176043.

The spelling of 653996257 in words is "six hundred fifty-three million, nine hundred ninety-six thousand, two hundred fifty-seven".