698525749 has 2 divisors, whose sum is σ = 698525750. Its totient is φ = 698525748.

The previous prime is 698525717. The next prime is 698525803. The reversal of 698525749 is 947525896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664711524 + 33814225 = 25782^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 698525749 - 2⁵ = 698525717 is a prime.

It is a super-2 number, since 2×698525749² = 975876444032022002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 698525749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698525549) 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, 349262874 + 349262875.

It is an arithmetic number, because the mean of its divisors is an integer number (349262875).

Almost surely, 2^698525749 is an apocalyptic number.

It is an amenable number.

698525749 is a deficient number, since it is larger than the sum of its proper divisors (1).

698525749 is an equidigital number, since it uses as much as digits as its factorization.

698525749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 55.

The square root of 698525749 is about 26429.6377008842. The cubic root of 698525749 is about 887.2802334644.

The spelling of 698525749 in words is "six hundred ninety-eight million, five hundred twenty-five thousand, seven hundred forty-nine".