697920697 has 2 divisors, whose sum is σ = 697920698. Its totient is φ = 697920696.

The previous prime is 697920683. The next prime is 697920731. The reversal of 697920697 is 796029796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683090496 + 14830201 = 26136^2 + 3851^2 .

It is a cyclic number.

It is not a de Polignac number, because 697920697 - 2²⁷ = 563702969 is a prime.

It is not a weakly prime, because it can be changed into another prime (697920667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348960348 + 348960349.

It is an arithmetic number, because the mean of its divisors is an integer number (348960349).

Almost surely, 2^697920697 is an apocalyptic number.

It is an amenable number.

697920697 is a deficient number, since it is larger than the sum of its proper divisors (1).

697920697 is an equidigital number, since it uses as much as digits as its factorization.

697920697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 697920697 is about 26418.1887532056. The cubic root of 697920697 is about 887.0239767413.

The spelling of 697920697 in words is "six hundred ninety-seven million, nine hundred twenty thousand, six hundred ninety-seven".