697513261 has 2 divisors, whose sum is σ = 697513262. Its totient is φ = 697513260.

The previous prime is 697513241. The next prime is 697513273. The reversal of 697513261 is 162315796.

697513261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690060361 + 7452900 = 26269^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 697513261 - 2⁹ = 697512749 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 (697513211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348756630 + 348756631.

It is an arithmetic number, because the mean of its divisors is an integer number (348756631).

Almost surely, 2^697513261 is an apocalyptic number.

It is an amenable number.

697513261 is a deficient number, since it is larger than the sum of its proper divisors (1).

697513261 is an equidigital number, since it uses as much as digits as its factorization.

697513261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 697513261 is about 26410.4763493580. The cubic root of 697513261 is about 886.8513325554.

The spelling of 697513261 in words is "six hundred ninety-seven million, five hundred thirteen thousand, two hundred sixty-one".