699649865 has 8 divisors (see below), whose sum is σ = 840238920. Its totient is φ = 559280512.

The previous prime is 699649859. The next prime is 699649877. The reversal of 699649865 is 568946996.

It can be written as a sum of positive squares in 4 ways, for example, as 139901584 + 559748281 = 11828^2 + 23659^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 699649865 - 2⁶ = 699649801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 699649798 and 699649807.

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, 47834 + ... + 60723.

It is an arithmetic number, because the mean of its divisors is an integer number (105029865).

Almost surely, 2^699649865 is an apocalyptic number.

It is an amenable number.

699649865 is a deficient number, since it is larger than the sum of its proper divisors (140589055).

699649865 is a wasteful number, since it uses less digits than its factorization.

699649865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109851.

The product of its digits is 25194240, while the sum is 62.

The square root of 699649865 is about 26450.8953534658. The cubic root of 699649865 is about 887.7559359729.

The spelling of 699649865 in words is "six hundred ninety-nine million, six hundred forty-nine thousand, eight hundred sixty-five".