696657 has 8 divisors (see below), whose sum is σ = 1000384. Its totient is φ = 428688.

The previous prime is 696653. The next prime is 696659. The reversal of 696657 is 756696.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 696657 - 2² = 696653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 17863 = 696657 / (6 + 9 + 6 + 6 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8893 + ... + 8970.

It is an arithmetic number, because the mean of its divisors is an integer number (125048).

2⁶⁹⁶⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

696657 is a deficient number, since it is larger than the sum of its proper divisors (303727).

696657 is a wasteful number, since it uses less digits than its factorization.

696657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17879.

The product of its digits is 68040, while the sum is 39.

The square root of 696657 is about 834.6598109410. The cubic root of 696657 is about 88.6488287054.

Adding to 696657 its sum of digits (39), we get a palindrome (696696).

The spelling of 696657 in words is "six hundred ninety-six thousand, six hundred fifty-seven".