68747121 has 6 divisors (see below), whose sum is σ = 99301410. Its totient is φ = 45831408.

The previous prime is 68747117. The next prime is 68747141. The reversal of 68747121 is 12174786.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 23386896 = 6735^2 + 4836^2 .

It is not a de Polignac number, because 68747121 - 2² = 68747117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68747141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3819276 + ... + 3819293.

It is an arithmetic number, because the mean of its divisors is an integer number (16550235).

Almost surely, 2^68747121 is an apocalyptic number.

It is an amenable number.

68747121 is a deficient number, since it is larger than the sum of its proper divisors (30554289).

68747121 is a wasteful number, since it uses less digits than its factorization.

68747121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638575 (or 7638572 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 68747121 is about 8291.3883638387. The cubic root of 68747121 is about 409.6549168546.

The spelling of 68747121 in words is "sixty-eight million, seven hundred forty-seven thousand, one hundred twenty-one".