699004684225 has 9 divisors (see below), whose sum is σ = 866770992073. Its totient is φ = 559200403120.

The previous prime is 699004684223. The next prime is 699004684249. The reversal of 699004684225 is 522486400996.

The square root of 699004684225 is 836065.

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

It can be written as a sum of positive squares in 4 ways, for example, as 17627076289 + 681377607936 = 132767^2 + 825456^2 .

It is not a de Polignac number, because 699004684225 - 2¹ = 699004684223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699004684223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4096719 + ... + 4263931.

Almost surely, 2^699004684225 is an apocalyptic number.

699004684225 is the 836065-th square number.

699004684225 is the 418033-rd centered octagonal number.

It is an amenable number.

699004684225 is a deficient number, since it is larger than the sum of its proper divisors (167766307848).

699004684225 is an frugal number, since it uses more digits than its factorization.

699004684225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334436 (or 167218 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 699004684225 in words is "six hundred ninety-nine billion, four million, six hundred eighty-four thousand, two hundred twenty-five".