698111849 has 2 divisors, whose sum is σ = 698111850. Its totient is φ = 698111848.

The previous prime is 698111789. The next prime is 698111881. The reversal of 698111849 is 948111896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452625625 + 245486224 = 21275^2 + 15668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698111849 is a prime.

It is not a weakly prime, because it can be changed into another prime (698113849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349055924 + 349055925.

It is an arithmetic number, because the mean of its divisors is an integer number (349055925).

Almost surely, 2^698111849 is an apocalyptic number.

It is an amenable number.

698111849 is a deficient number, since it is larger than the sum of its proper divisors (1).

698111849 is an equidigital number, since it uses as much as digits as its factorization.

698111849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 47.

The square root of 698111849 is about 26421.8063159959. The cubic root of 698111849 is about 887.1049510461.

Adding to 698111849 its sum of digits (47), we get a palindrome (698111896).

The spelling of 698111849 in words is "six hundred ninety-eight million, one hundred eleven thousand, eight hundred forty-nine".