68002691 has 4 divisors (see below), whose sum is σ = 71581800. Its totient is φ = 64423584.

The previous prime is 68002687. The next prime is 68002717. The reversal of 68002691 is 19620086.

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 68002691 - 2² = 68002687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68002621) 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 3 ways as a sum of consecutive naturals, for example, 1789526 + ... + 1789563.

It is an arithmetic number, because the mean of its divisors is an integer number (17895450).

Almost surely, 2^68002691 is an apocalyptic number.

68002691 is a deficient number, since it is larger than the sum of its proper divisors (3579109).

68002691 is a wasteful number, since it uses less digits than its factorization.

68002691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579108.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 68002691 is about 8246.3744154628. The cubic root of 68002691 is about 408.1708943040.

The spelling of 68002691 in words is "sixty-eight million, two thousand, six hundred ninety-one".