68920845 has 16 divisors (see below), whose sum is σ = 126026880. Its totient is φ = 31506624.

The previous prime is 68920837. The next prime is 68920853. The reversal of 68920845 is 54802986.

It is an interprime number because it is at equal distance from previous prime (68920837) and next prime (68920853).

It is not a de Polignac number, because 68920845 - 2³ = 68920837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68920797 and 68920806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328090 + ... + 328299.

It is an arithmetic number, because the mean of its divisors is an integer number (7876680).

Almost surely, 2^68920845 is an apocalyptic number.

It is an amenable number.

68920845 is a deficient number, since it is larger than the sum of its proper divisors (57106035).

68920845 is a wasteful number, since it uses less digits than its factorization.

68920845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656404.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 68920845 is about 8301.8579245853. The cubic root of 68920845 is about 409.9996926430. Note that the first 3 decimals are identical.

The spelling of 68920845 in words is "sixty-eight million, nine hundred twenty thousand, eight hundred forty-five".