68981317 has 4 divisors (see below), whose sum is σ = 69017760. Its totient is φ = 68944876.

The previous prime is 68981309. The next prime is 68981321. The reversal of 68981317 is 71318986.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71318986 = 2 ⋅35659493.

It is a cyclic number.

It is not a de Polignac number, because 68981317 - 2³ = 68981309 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 (68981327) 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, 15217 + ... + 19222.

It is an arithmetic number, because the mean of its divisors is an integer number (17254440).

Almost surely, 2^68981317 is an apocalyptic number.

It is an amenable number.

68981317 is a deficient number, since it is larger than the sum of its proper divisors (36443).

68981317 is a wasteful number, since it uses less digits than its factorization.

68981317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36442.

The product of its digits is 72576, while the sum is 43.

The square root of 68981317 is about 8305.4992023358. The cubic root of 68981317 is about 410.1195705192.

The spelling of 68981317 in words is "sixty-eight million, nine hundred eighty-one thousand, three hundred seventeen".