695639 has 4 divisors (see below), whose sum is σ = 795024. Its totient is φ = 596256.

The previous prime is 695627. The next prime is 695641. The reversal of 695639 is 936596.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-695639 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 (695659) 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, 49682 + ... + 49695.

It is an arithmetic number, because the mean of its divisors is an integer number (198756).

2⁶⁹⁵⁶³⁹ is an apocalyptic number.

695639 is a deficient number, since it is larger than the sum of its proper divisors (99385).

695639 is an equidigital number, since it uses as much as digits as its factorization.

695639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99384.

The product of its digits is 43740, while the sum is 38.

The square root of 695639 is about 834.0497587075. The cubic root of 695639 is about 88.6056278665.

The spelling of 695639 in words is "six hundred ninety-five thousand, six hundred thirty-nine".