68694081 has 4 divisors (see below), whose sum is σ = 91592112. Its totient is φ = 45796052.

The previous prime is 68694079. The next prime is 68694083. The reversal of 68694081 is 18049686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (68694079) and next prime (68694083).

It is a cyclic number.

It is not a de Polignac number, because 68694081 - 2¹ = 68694079 is a prime.

It is a super-2 number, since 2×68694081² = 9437753528869122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68694083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11449011 + ... + 11449016.

It is an arithmetic number, because the mean of its divisors is an integer number (22898028).

Almost surely, 2^68694081 is an apocalyptic number.

It is an amenable number.

68694081 is a deficient number, since it is larger than the sum of its proper divisors (22898031).

68694081 is a wasteful number, since it uses less digits than its factorization.

68694081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22898030.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 68694081 is about 8288.1892473567. The cubic root of 68694081 is about 409.5495369891.

The spelling of 68694081 in words is "sixty-eight million, six hundred ninety-four thousand, eighty-one".