698112391 has 2 divisors, whose sum is σ = 698112392. Its totient is φ = 698112390.

The previous prime is 698112347. The next prime is 698112397. The reversal of 698112391 is 193211896.

698112391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 698112391 - 2²⁷ = 563894663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698112397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349056195 + 349056196.

It is an arithmetic number, because the mean of its divisors is an integer number (349056196).

Almost surely, 2^698112391 is an apocalyptic number.

698112391 is a deficient number, since it is larger than the sum of its proper divisors (1).

698112391 is an equidigital number, since it uses as much as digits as its factorization.

698112391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 698112391 is about 26421.8165726734. The cubic root of 698112391 is about 887.1051806228.

The spelling of 698112391 in words is "six hundred ninety-eight million, one hundred twelve thousand, three hundred ninety-one".