68642306 has 4 divisors (see below), whose sum is σ = 102963462. Its totient is φ = 34321152.

The previous prime is 68642279. The next prime is 68642317. The reversal of 68642306 is 60324686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60324686 = 2 ⋅30162343.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 25411681 = 6575^2 + 5041^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17160575 + ... + 17160578.

Almost surely, 2^68642306 is an apocalyptic number.

68642306 is a deficient number, since it is larger than the sum of its proper divisors (34321156).

68642306 is a wasteful number, since it uses less digits than its factorization.

68642306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34321155.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 68642306 is about 8285.0652381258. The cubic root of 68642306 is about 409.4466180937.

The spelling of 68642306 in words is "sixty-eight million, six hundred forty-two thousand, three hundred six".