697509313 has 2 divisors, whose sum is σ = 697509314. Its totient is φ = 697509312.

The previous prime is 697509299. The next prime is 697509347. The reversal of 697509313 is 313905796.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622652209 + 74857104 = 24953^2 + 8652^2 .

It is a cyclic number.

It is not a de Polignac number, because 697509313 - 2¹³ = 697501121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 697509313.

It is not a weakly prime, because it can be changed into another prime (697509413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348754656 + 348754657.

It is an arithmetic number, because the mean of its divisors is an integer number (348754657).

Almost surely, 2^697509313 is an apocalyptic number.

It is an amenable number.

697509313 is a deficient number, since it is larger than the sum of its proper divisors (1).

697509313 is an equidigital number, since it uses as much as digits as its factorization.

697509313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 697509313 is about 26410.4016061854. The cubic root of 697509313 is about 886.8496593276.

The spelling of 697509313 in words is "six hundred ninety-seven million, five hundred nine thousand, three hundred thirteen".