68723081 has 4 divisors (see below), whose sum is σ = 78540672. Its totient is φ = 58905492.

The previous prime is 68723059. The next prime is 68723089. The reversal of 68723081 is 18032786.

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 68723081 - 2¹⁴ = 68706697 is a prime.

It is a super-2 number, since 2×68723081² = 9445723724265122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68723089) 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, 4908785 + ... + 4908798.

It is an arithmetic number, because the mean of its divisors is an integer number (19635168).

Almost surely, 2^68723081 is an apocalyptic number.

It is an amenable number.

68723081 is a deficient number, since it is larger than the sum of its proper divisors (9817591).

68723081 is an equidigital number, since it uses as much as digits as its factorization.

68723081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9817590.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 68723081 is about 8289.9385401823. The cubic root of 68723081 is about 409.6071609040.

The spelling of 68723081 in words is "sixty-eight million, seven hundred twenty-three thousand, eighty-one".