68892920407 has 4 divisors (see below), whose sum is σ = 68914259320. Its totient is φ = 68871581496.

The previous prime is 68892920389. The next prime is 68892920431. The reversal of 68892920407 is 70402929886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70402929886 = 2 ⋅35201464943.

It is a cyclic number.

It is not a de Polignac number, because 68892920407 - 2¹¹ = 68892918359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68892420407) 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, 10664613 + ... + 10671070.

It is an arithmetic number, because the mean of its divisors is an integer number (17228564830).

Almost surely, 2^68892920407 is an apocalyptic number.

68892920407 is a deficient number, since it is larger than the sum of its proper divisors (21338913).

68892920407 is a wasteful number, since it uses less digits than its factorization.

68892920407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21338912.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 68892920407 in words is "sixty-eight billion, eight hundred ninety-two million, nine hundred twenty thousand, four hundred seven".