698234432891 has 2 divisors, whose sum is σ = 698234432892. Its totient is φ = 698234432890.

The previous prime is 698234432809. The next prime is 698234432933. The reversal of 698234432891 is 198234432896.

698234432891 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 a de Polignac number, because none of the positive numbers 2^k-698234432891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 698234432891.

It is not a weakly prime, because it can be changed into another prime (698234437891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349117216445 + 349117216446.

It is an arithmetic number, because the mean of its divisors is an integer number (349117216446).

Almost surely, 2^698234432891 is an apocalyptic number.

698234432891 is a deficient number, since it is larger than the sum of its proper divisors (1).

698234432891 is an equidigital number, since it uses as much as digits as its factorization.

698234432891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 59.

The spelling of 698234432891 in words is "six hundred ninety-eight billion, two hundred thirty-four million, four hundred thirty-two thousand, eight hundred ninety-one".