68920061 has 4 divisors (see below), whose sum is σ = 78765792. Its totient is φ = 59074332.

The previous prime is 68920051. The next prime is 68920063. The reversal of 68920061 is 16002986.

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 a de Polignac number, because none of the positive numbers 2^k-68920061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68920063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4922855 + ... + 4922868.

It is an arithmetic number, because the mean of its divisors is an integer number (19691448).

Almost surely, 2^68920061 is an apocalyptic number.

It is an amenable number.

68920061 is a deficient number, since it is larger than the sum of its proper divisors (9845731).

68920061 is an equidigital number, since it uses as much as digits as its factorization.

68920061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9845730.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 68920061 is about 8301.8107061050. The cubic root of 68920061 is about 409.9981380046.

The spelling of 68920061 in words is "sixty-eight million, nine hundred twenty thousand, sixty-one".