68981881 has 8 divisors (see below), whose sum is σ = 70499520. Its totient is φ = 67480752.

The previous prime is 68981879. The next prime is 68981893. The reversal of 68981881 is 18818986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68981881 - 2¹ = 68981879 is a prime.

It is a super-2 number, since 2×68981881² = 9516999812596322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68981821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4515 + ... + 12583.

It is an arithmetic number, because the mean of its divisors is an integer number (8812440).

Almost surely, 2^68981881 is an apocalyptic number.

It is an amenable number.

68981881 is a deficient number, since it is larger than the sum of its proper divisors (1517639).

68981881 is a wasteful number, since it uses less digits than its factorization.

68981881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8255.

The product of its digits is 221184, while the sum is 49.

The square root of 68981881 is about 8305.5331556740. The cubic root of 68981881 is about 410.1206882461.

The spelling of 68981881 in words is "sixty-eight million, nine hundred eighty-one thousand, eight hundred eighty-one".