705497657 has 2 divisors, whose sum is σ = 705497658. Its totient is φ = 705497656.

The previous prime is 705497629. The next prime is 705497693. The reversal of 705497657 is 756794507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703098256 + 2399401 = 26516^2 + 1549^2 .

It is a cyclic number.

It is not a de Polignac number, because 705497657 - 2²² = 701303353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (705497057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352748828 + 352748829.

It is an arithmetic number, because the mean of its divisors is an integer number (352748829).

Almost surely, 2^705497657 is an apocalyptic number.

It is an amenable number.

705497657 is a deficient number, since it is larger than the sum of its proper divisors (1).

705497657 is an equidigital number, since it uses as much as digits as its factorization.

705497657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1852200, while the sum is 50.

The square root of 705497657 is about 26561.2058649452. The cubic root of 705497657 is about 890.2224150605. Note that the first 3 decimals are identical.

The spelling of 705497657 in words is "seven hundred five million, four hundred ninety-seven thousand, six hundred fifty-seven".