695409681 has 4 divisors (see below), whose sum is σ = 927212912. Its totient is φ = 463606452.

The previous prime is 695409641. The next prime is 695409721. The reversal of 695409681 is 186904596.

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 an interprime number because it is at equal distance from previous prime (695409641) and next prime (695409721).

It is not a de Polignac number, because 695409681 - 2⁷ = 695409553 is a prime.

It is a super-2 number, since 2×695409681² = 967189248857043522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 695409681.

It is not an unprimeable number, because it can be changed into a prime (695409601) 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, 115901611 + ... + 115901616.

It is an arithmetic number, because the mean of its divisors is an integer number (231803228).

Almost surely, 2^695409681 is an apocalyptic number.

It is an amenable number.

695409681 is a deficient number, since it is larger than the sum of its proper divisors (231803231).

695409681 is a wasteful number, since it uses less digits than its factorization.

695409681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231803230.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 695409681 is about 26370.6215512642. The cubic root of 695409681 is about 885.9589044662.

The spelling of 695409681 in words is "six hundred ninety-five million, four hundred nine thousand, six hundred eighty-one".