697448189 has 2 divisors, whose sum is σ = 697448190. Its totient is φ = 697448188.

The previous prime is 697448179. The next prime is 697448203. The reversal of 697448189 is 981844796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354568900 + 342879289 = 18830^2 + 18517^2 .

It is a cyclic number.

It is not a de Polignac number, because 697448189 - 2²⁸ = 429012733 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 (697448179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348724094 + 348724095.

It is an arithmetic number, because the mean of its divisors is an integer number (348724095).

Almost surely, 2^697448189 is an apocalyptic number.

It is an amenable number.

697448189 is a deficient number, since it is larger than the sum of its proper divisors (1).

697448189 is an equidigital number, since it uses as much as digits as its factorization.

697448189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 697448189 is about 26409.2443852527. The cubic root of 697448189 is about 886.8237531588.

The spelling of 697448189 in words is "six hundred ninety-seven million, four hundred forty-eight thousand, one hundred eighty-nine".