68712945 has 24 divisors (see below), whose sum is σ = 127891584. Its totient is φ = 31411296.

The previous prime is 68712913. The next prime is 68712953. The reversal of 68712945 is 54921786.

It is not a de Polignac number, because 68712945 - 2⁵ = 68712913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68712897 and 68712906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46009 + ... + 47478.

It is an arithmetic number, because the mean of its divisors is an integer number (5328816).

Almost surely, 2^68712945 is an apocalyptic number.

It is an amenable number.

68712945 is a deficient number, since it is larger than the sum of its proper divisors (59178639).

68712945 is a wasteful number, since it uses less digits than its factorization.

68712945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93509 (or 93502 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 68712945 is about 8289.3271741439. The cubic root of 68712945 is about 409.5870221953.

The spelling of 68712945 in words is "sixty-eight million, seven hundred twelve thousand, nine hundred forty-five".