688963 has 4 divisors (see below), whose sum is σ = 751608. Its totient is φ = 626320.

The previous prime is 688957. The next prime is 688969. The reversal of 688963 is 369886.

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

It is an interprime number because it is at equal distance from previous prime (688957) and next prime (688969).

It is a cyclic number.

It is not a de Polignac number, because 688963 - 2⁹ = 688451 is a prime.

It is a super-3 number, since 3×688963³ = 981090233396017041, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (688969) 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, 31306 + ... + 31327.

It is an arithmetic number, because the mean of its divisors is an integer number (187902).

2⁶⁸⁸⁹⁶³ is an apocalyptic number.

688963 is a deficient number, since it is larger than the sum of its proper divisors (62645).

688963 is a wasteful number, since it uses less digits than its factorization.

688963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62644.

The product of its digits is 62208, while the sum is 40.

The square root of 688963 is about 830.0379509396. The cubic root of 688963 is about 88.3212688717.

The spelling of 688963 in words is "six hundred eighty-eight thousand, nine hundred sixty-three".