699955385 has 4 divisors (see below), whose sum is σ = 839946468. Its totient is φ = 559964304.

The previous prime is 699955379. The next prime is 699955387. The reversal of 699955385 is 583559996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 414041104 + 285914281 = 20348^2 + 16909^2 .

It is a cyclic number.

It is not a de Polignac number, because 699955385 - 2⁴ = 699955369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699955387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69995534 + ... + 69995543.

It is an arithmetic number, because the mean of its divisors is an integer number (209986617).

Almost surely, 2^699955385 is an apocalyptic number.

It is an amenable number.

699955385 is a deficient number, since it is larger than the sum of its proper divisors (139991083).

699955385 is a wasteful number, since it uses less digits than its factorization.

699955385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139991082.

The product of its digits is 13122000, while the sum is 59.

The square root of 699955385 is about 26456.6699529627. The cubic root of 699955385 is about 887.8851376099.

The spelling of 699955385 in words is "six hundred ninety-nine million, nine hundred fifty-five thousand, three hundred eighty-five".