699437005 has 4 divisors (see below), whose sum is σ = 839324412. Its totient is φ = 559549600.

The previous prime is 699437003. The next prime is 699437021. The reversal of 699437005 is 500734996.

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 139736041 + 559700964 = 11821^2 + 23658^2 .

It is not a de Polignac number, because 699437005 - 2¹ = 699437003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699437003) 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, 69943696 + ... + 69943705.

It is an arithmetic number, because the mean of its divisors is an integer number (209831103).

Almost surely, 2^699437005 is an apocalyptic number.

It is an amenable number.

699437005 is a deficient number, since it is larger than the sum of its proper divisors (139887407).

699437005 is a wasteful number, since it uses less digits than its factorization.

699437005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139887406.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 699437005 is about 26446.8713650594. The cubic root of 699437005 is about 887.6658971764.

The spelling of 699437005 in words is "six hundred ninety-nine million, four hundred thirty-seven thousand, five".