68993071 has 4 divisors (see below), whose sum is σ = 78849232. Its totient is φ = 59136912.

The previous prime is 68993069. The next prime is 68993081. The reversal of 68993071 is 17039986.

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 68993071 - 2¹ = 68993069 is a prime.

It is a super-2 number, since 2×68993071² = 9520087692022082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68993081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4928070 + ... + 4928083.

It is an arithmetic number, because the mean of its divisors is an integer number (19712308).

Almost surely, 2^68993071 is an apocalyptic number.

68993071 is a deficient number, since it is larger than the sum of its proper divisors (9856161).

68993071 is an equidigital number, since it uses as much as digits as its factorization.

68993071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856160.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68993071 is about 8306.2067756588. The cubic root of 68993071 is about 410.1428631627.

The spelling of 68993071 in words is "sixty-eight million, nine hundred ninety-three thousand, seventy-one".