68982121 has 4 divisors (see below), whose sum is σ = 74288452. Its totient is φ = 63675792.

The previous prime is 68982101. The next prime is 68982139. The reversal of 68982121 is 12128986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4260096 + 64722025 = 2064^2 + 8045^2 .

It is a cyclic number.

It is not a de Polignac number, because 68982121 - 2⁷ = 68981993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68982101) 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, 2653146 + ... + 2653171.

It is an arithmetic number, because the mean of its divisors is an integer number (18572113).

Almost surely, 2^68982121 is an apocalyptic number.

It is an amenable number.

68982121 is a deficient number, since it is larger than the sum of its proper divisors (5306331).

68982121 is a wasteful number, since it uses less digits than its factorization.

68982121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306330.

The product of its digits is 13824, while the sum is 37.

The square root of 68982121 is about 8305.5476038609. The cubic root of 68982121 is about 410.1211638727.

The spelling of 68982121 in words is "sixty-eight million, nine hundred eighty-two thousand, one hundred twenty-one".