696719009 has 4 divisors (see below), whose sum is σ = 796250304. Its totient is φ = 597187716.

The previous prime is 696718969. The next prime is 696719011. The reversal of 696719009 is 900917696.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 696719009 - 2¹² = 696714913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696719029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49765637 + ... + 49765650.

It is an arithmetic number, because the mean of its divisors is an integer number (199062576).

Almost surely, 2^696719009 is an apocalyptic number.

It is an amenable number.

696719009 is a deficient number, since it is larger than the sum of its proper divisors (99531295).

696719009 is an equidigital number, since it uses as much as digits as its factorization.

696719009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99531294.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 696719009 is about 26395.4353818989. The cubic root of 696719009 is about 886.5145881944.

The spelling of 696719009 in words is "six hundred ninety-six million, seven hundred nineteen thousand, nine".