697791371 has 2 divisors, whose sum is σ = 697791372. Its totient is φ = 697791370.

The previous prime is 697791343. The next prime is 697791373. The reversal of 697791371 is 173197796.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697791371 is a prime.

Together with 697791373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (697791373) 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, 348895685 + 348895686.

It is an arithmetic number, because the mean of its divisors is an integer number (348895686).

Almost surely, 2^697791371 is an apocalyptic number.

697791371 is a deficient number, since it is larger than the sum of its proper divisors (1).

697791371 is an equidigital number, since it uses as much as digits as its factorization.

697791371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500094, while the sum is 50.

The square root of 697791371 is about 26415.7409701110. The cubic root of 697791371 is about 886.9691842939.

The spelling of 697791371 in words is "six hundred ninety-seven million, seven hundred ninety-one thousand, three hundred seventy-one".