697091099 has 2 divisors, whose sum is σ = 697091100. Its totient is φ = 697091098.

The previous prime is 697091093. The next prime is 697091111. The reversal of 697091099 is 990190796.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 697091099 - 2⁸ = 697090843 is a prime.

It is not a weakly prime, because it can be changed into another prime (697091093) 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, 348545549 + 348545550.

It is an arithmetic number, because the mean of its divisors is an integer number (348545550).

Almost surely, 2^697091099 is an apocalyptic number.

697091099 is a deficient number, since it is larger than the sum of its proper divisors (1).

697091099 is an equidigital number, since it uses as much as digits as its factorization.

697091099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 697091099 is about 26402.4828188563. The cubic root of 697091099 is about 886.6723775394.

The spelling of 697091099 in words is "six hundred ninety-seven million, ninety-one thousand, ninety-nine".