68478091 has 8 divisors (see below), whose sum is σ = 79097904. Its totient is φ = 58590720.

The previous prime is 68478079. The next prime is 68478097. The reversal of 68478091 is 19087486.

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 68478091 - 2⁷ = 68477963 is a prime.

It is a super-3 number, since 3×68478091³ (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 (68478097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182910 + ... + 183283.

It is an arithmetic number, because the mean of its divisors is an integer number (9887238).

Almost surely, 2^68478091 is an apocalyptic number.

68478091 is a deficient number, since it is larger than the sum of its proper divisors (10619813).

68478091 is a wasteful number, since it uses less digits than its factorization.

68478091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366221.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 68478091 is about 8275.1490016797. The cubic root of 68478091 is about 409.1198469930.

The spelling of 68478091 in words is "sixty-eight million, four hundred seventy-eight thousand, ninety-one".