68753945 has 8 divisors (see below), whose sum is σ = 88851336. Its totient is φ = 50772096.

The previous prime is 68753941. The next prime is 68753953. The reversal of 68753945 is 54935786.

It can be written as a sum of positive squares in 4 ways, for example, as 63001 + 68690944 = 251^2 + 8288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68753945 - 2² = 68753941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68753945.

It is not an unprimeable number, because it can be changed into a prime (68753941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528812 + ... + 528941.

It is an arithmetic number, because the mean of its divisors is an integer number (11106417).

Almost surely, 2^68753945 is an apocalyptic number.

68753945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68753945 is a deficient number, since it is larger than the sum of its proper divisors (20097391).

68753945 is a wasteful number, since it uses less digits than its factorization.

68753945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057771.

The product of its digits is 907200, while the sum is 47.

The square root of 68753945 is about 8291.7998649268. The cubic root of 68753945 is about 409.6684708411.

The spelling of 68753945 in words is "sixty-eight million, seven hundred fifty-three thousand, nine hundred forty-five".