698914969 has 3 divisors (see below), whose sum is σ = 698941407. Its totient is φ = 698888532.

The previous prime is 698914963. The next prime is 698915017. The reversal of 698914969 is 969419896.

The square root of 698914969 is 26437.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 582015625 + 116899344 = 24125^2 + 10812^2 .

It is not a de Polignac number, because 698914969 - 2⁹ = 698914457 is a prime.

It is a super-2 number, since 2×698914969² = 976964267784541922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698914963) 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 in 2 ways as a sum of consecutive naturals, for example, 13219 + ... + 39655.

It is an arithmetic number, because the mean of its divisors is an integer number (232980469).

Almost surely, 2^698914969 is an apocalyptic number.

698914969 is the 26437-th square number.

698914969 is the 13219-th centered octagonal number.

It is an amenable number.

698914969 is a deficient number, since it is larger than the sum of its proper divisors (26438).

698914969 is an frugal number, since it uses more digits than its factorization.

698914969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52874 (or 26437 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 61.

The cubic root of 698914969 is about 887.4450009956.

The spelling of 698914969 in words is "six hundred ninety-eight million, nine hundred fourteen thousand, nine hundred sixty-nine".