68615 has 4 divisors (see below), whose sum is σ = 82344. Its totient is φ = 54888.

The previous prime is 68611. The next prime is 68633. The reversal of 68615 is 51686.

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

It is a cyclic number.

It is not a de Polignac number, because 68615 - 2² = 68611 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 (68611) 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, 6857 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (20586).

2⁶⁸⁶¹⁵ is an apocalyptic number.

68615 is a deficient number, since it is larger than the sum of its proper divisors (13729).

68615 is a wasteful number, since it uses less digits than its factorization.

68615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13728.

The product of its digits is 1440, while the sum is 26.

The square root of 68615 is about 261.9446506421. The cubic root of 68615 is about 40.9392318091.

The spelling of 68615 in words is "sixty-eight thousand, six hundred fifteen".