68639801 has 4 divisors (see below), whose sum is σ = 68847504. Its totient is φ = 68432100.

The previous prime is 68639771. The next prime is 68639821. The reversal of 68639801 is 10893686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68639801 - 2¹⁰ = 68638777 is a prime.

It is a super-2 number, since 2×68639801² = 9422844562639202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68639821) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103355 + ... + 104016.

It is an arithmetic number, because the mean of its divisors is an integer number (17211876).

Almost surely, 2^68639801 is an apocalyptic number.

It is an amenable number.

68639801 is a deficient number, since it is larger than the sum of its proper divisors (207703).

68639801 is a wasteful number, since it uses less digits than its factorization.

68639801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207702.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 68639801 is about 8284.9140611113. The cubic root of 68639801 is about 409.4416373158.

The spelling of 68639801 in words is "sixty-eight million, six hundred thirty-nine thousand, eight hundred one".