67920085 has 4 divisors (see below), whose sum is σ = 81504108. Its totient is φ = 54336064.

The previous prime is 67920077. The next prime is 67920089. The reversal of 67920085 is 58002976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28494244 + 39425841 = 5338^2 + 6279^2 .

It is a cyclic number.

It is not a de Polignac number, because 67920085 - 2³ = 67920077 is a prime.

It is a super-2 number, since 2×67920085² = 9226275892814450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67920089) 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, 6792004 + ... + 6792013.

It is an arithmetic number, because the mean of its divisors is an integer number (20376027).

Almost surely, 2^67920085 is an apocalyptic number.

It is an amenable number.

67920085 is a deficient number, since it is larger than the sum of its proper divisors (13584023).

67920085 is a wasteful number, since it uses less digits than its factorization.

67920085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13584022.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 67920085 is about 8241.3642681294. The cubic root of 67920085 is about 408.0055526766.

The spelling of 67920085 in words is "sixty-seven million, nine hundred twenty thousand, eighty-five".