699987605 has 8 divisors (see below), whose sum is σ = 842082264. Its totient is φ = 558592000.

The previous prime is 699987577. The next prime is 699987643. The reversal of 699987605 is 506789996.

It can be written as a sum of positive squares in 4 ways, for example, as 377641489 + 322346116 = 19433^2 + 17954^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 699987605 - 2¹² = 699983509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172556 + ... + 176565.

It is an arithmetic number, because the mean of its divisors is an integer number (105260283).

Almost surely, 2^699987605 is an apocalyptic number.

It is an amenable number.

699987605 is a deficient number, since it is larger than the sum of its proper divisors (142094659).

699987605 is a wasteful number, since it uses less digits than its factorization.

699987605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349527.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The square root of 699987605 is about 26457.2788661268. The cubic root of 699987605 is about 887.8987609640.

The spelling of 699987605 in words is "six hundred ninety-nine million, nine hundred eighty-seven thousand, six hundred five".