68513873 has 4 divisors (see below), whose sum is σ = 68590320. Its totient is φ = 68437428.

The previous prime is 68513869. The next prime is 68513903. The reversal of 68513873 is 37831586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68513873 - 2² = 68513869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68513873.

It is not an unprimeable number, because it can be changed into a prime (68513843) 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, 36863 + ... + 38676.

It is an arithmetic number, because the mean of its divisors is an integer number (17147580).

Almost surely, 2^68513873 is an apocalyptic number.

It is an amenable number.

68513873 is a deficient number, since it is larger than the sum of its proper divisors (76447).

68513873 is an equidigital number, since it uses as much as digits as its factorization.

68513873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76446.

The product of its digits is 120960, while the sum is 41.

The square root of 68513873 is about 8277.3107347737. The cubic root of 68513873 is about 409.1910940010.

The spelling of 68513873 in words is "sixty-eight million, five hundred thirteen thousand, eight hundred seventy-three".