695982389 has 4 divisors (see below), whose sum is σ = 696188556. Its totient is φ = 695776224.

The previous prime is 695982377. The next prime is 695982409. The reversal of 695982389 is 983289596.

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 313467025 + 382515364 = 17705^2 + 19558^2 .

It is a cyclic number.

It is not a de Polignac number, because 695982389 - 2¹² = 695978293 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 (695982359) 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, 97934 + ... + 104799.

It is an arithmetic number, because the mean of its divisors is an integer number (174047139).

Almost surely, 2^695982389 is an apocalyptic number.

It is an amenable number.

695982389 is a deficient number, since it is larger than the sum of its proper divisors (206167).

695982389 is a wasteful number, since it uses less digits than its factorization.

695982389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206166.

The product of its digits is 8398080, while the sum is 59.

The square root of 695982389 is about 26381.4781428183. The cubic root of 695982389 is about 886.2020496416.

The spelling of 695982389 in words is "six hundred ninety-five million, nine hundred eighty-two thousand, three hundred eighty-nine".