68986091 has 4 divisors (see below), whose sum is σ = 69174432. Its totient is φ = 68797752.

The previous prime is 68986087. The next prime is 68986103. The reversal of 68986091 is 19068986.

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 68986091 - 2² = 68986087 is a prime.

It is a super-3 number, since 3×68986091³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68986991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93620 + ... + 94353.

It is an arithmetic number, because the mean of its divisors is an integer number (17293608).

Almost surely, 2^68986091 is an apocalyptic number.

68986091 is a deficient number, since it is larger than the sum of its proper divisors (188341).

68986091 is a wasteful number, since it uses less digits than its factorization.

68986091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188340.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 68986091 is about 8305.7865973067. The cubic root of 68986091 is about 410.1290313692.

The spelling of 68986091 in words is "sixty-eight million, nine hundred eighty-six thousand, ninety-one".