698941289 has 2 divisors, whose sum is σ = 698941290. Its totient is φ = 698941288.

The previous prime is 698941261. The next prime is 698941291. The reversal of 698941289 is 982149896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680166400 + 18774889 = 26080^2 + 4333^2 .

It is a cyclic number.

It is not a de Polignac number, because 698941289 - 2¹⁶ = 698875753 is a prime.

Together with 698941291, 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 (698941219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349470644 + 349470645.

It is an arithmetic number, because the mean of its divisors is an integer number (349470645).

Almost surely, 2^698941289 is an apocalyptic number.

It is an amenable number.

698941289 is a deficient number, since it is larger than the sum of its proper divisors (1).

698941289 is an equidigital number, since it uses as much as digits as its factorization.

698941289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 56.

The square root of 698941289 is about 26437.4977825058. The cubic root of 698941289 is about 887.4561407672.

The spelling of 698941289 in words is "six hundred ninety-eight million, nine hundred forty-one thousand, two hundred eighty-nine".