68690 has 8 divisors (see below), whose sum is σ = 123660. Its totient is φ = 27472.

The previous prime is 68687. The next prime is 68699. The reversal of 68690 is 9686.

It can be written as a sum of positive squares in 2 ways, for example, as 58081 + 10609 = 241^2 + 103^2 .

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

It is a super-2 number, since 2×68690² = 9436632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68699) 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, 3425 + ... + 3444.

2⁶⁸⁶⁹⁰ is an apocalyptic number.

68690 is a deficient number, since it is larger than the sum of its proper divisors (54970).

68690 is a wasteful number, since it uses less digits than its factorization.

68690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 68690 is about 262.0877715575. The cubic root of 68690 is about 40.9541426612.

The spelling of 68690 in words is "sixty-eight thousand, six hundred ninety".