696025009 has 4 divisors (see below), whose sum is σ = 698019700. Its totient is φ = 694030320.

The previous prime is 696024949. The next prime is 696025069. The reversal of 696025009 is 900520696.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (696024949) and next prime (696025069).

It can be written as a sum of positive squares in 2 ways, for example, as 624250225 + 71774784 = 24985^2 + 8472^2 .

It is a cyclic number.

It is not a de Polignac number, because 696025009 - 2⁷ = 696024881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696025069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996822 + ... + 997519.

It is an arithmetic number, because the mean of its divisors is an integer number (174504925).

Almost surely, 2^696025009 is an apocalyptic number.

It is an amenable number.

696025009 is a deficient number, since it is larger than the sum of its proper divisors (1994691).

696025009 is a wasteful number, since it uses less digits than its factorization.

696025009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994690.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 696025009 is about 26382.2858941374. The cubic root of 696025009 is about 886.2201387777.

The spelling of 696025009 in words is "six hundred ninety-six million, twenty-five thousand, nine".