68137445 has 8 divisors (see below), whose sum is σ = 86574744. Its totient is φ = 51303424.

The previous prime is 68137441. The next prime is 68137453. The reversal of 68137445 is 54473186.

It can be written as a sum of positive squares in 4 ways, for example, as 10042561 + 58094884 = 3169^2 + 7622^2 .

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 68137445 - 2² = 68137441 is a prime.

It is a super-2 number, since 2×68137445² = 9285422822256050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68137399 and 68137408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68137441) 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, 400724 + ... + 400893.

It is an arithmetic number, because the mean of its divisors is an integer number (10821843).

Almost surely, 2^68137445 is an apocalyptic number.

It is an amenable number.

68137445 is a deficient number, since it is larger than the sum of its proper divisors (18437299).

68137445 is a wasteful number, since it uses less digits than its factorization.

68137445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801639.

The product of its digits is 80640, while the sum is 38.

The square root of 68137445 is about 8254.5408715446. The cubic root of 68137445 is about 408.4403266297.

The spelling of 68137445 in words is "sixty-eight million, one hundred thirty-seven thousand, four hundred forty-five".