68852981 has 8 divisors (see below), whose sum is σ = 71328600. Its totient is φ = 66415360.

The previous prime is 68852963. The next prime is 68853023. The reversal of 68852981 is 18925886.

It can be written as a sum of positive squares in 4 ways, for example, as 4708900 + 64144081 = 2170^2 + 8009^2 .

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

It is not a de Polignac number, because 68852981 - 2¹⁰ = 68851957 is a prime.

It is a super-2 number, since 2×68852981² = 9481465985172722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68852951) 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, 5786 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (8916075).

Almost surely, 2^68852981 is an apocalyptic number.

It is an amenable number.

68852981 is a deficient number, since it is larger than the sum of its proper divisors (2475619).

68852981 is a wasteful number, since it uses less digits than its factorization.

68852981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18999.

The product of its digits is 276480, while the sum is 47.

The square root of 68852981 is about 8297.7696400900. The cubic root of 68852981 is about 409.8650775559.

The spelling of 68852981 in words is "sixty-eight million, eight hundred fifty-two thousand, nine hundred eighty-one".