920620685 has 8 divisors (see below), whose sum is σ = 1105151256. Its totient is φ = 736225600.

The previous prime is 920620667. The next prime is 920620691. The reversal of 920620685 is 586026029.

It can be written as a sum of positive squares in 4 ways, for example, as 44342281 + 876278404 = 6659^2 + 29602^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 920620685 - 2⁶ = 920620621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18266 + ... + 46635.

It is an arithmetic number, because the mean of its divisors is an integer number (138143907).

Almost surely, 2^920620685 is an apocalyptic number.

It is an amenable number.

920620685 is a deficient number, since it is larger than the sum of its proper divisors (184530571).

920620685 is a wasteful number, since it uses less digits than its factorization.

920620685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67743.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 920620685 is about 30341.7317402946. The cubic root of 920620685 is about 972.8074985338.

The spelling of 920620685 in words is "nine hundred twenty million, six hundred twenty thousand, six hundred eighty-five".