920685557 has 8 divisors (see below), whose sum is σ = 1005532320. Its totient is φ = 836030160.

The previous prime is 920685553. The next prime is 920685559. The reversal of 920685557 is 755586029.

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

It is a cyclic number.

It is not a de Polignac number, because 920685557 - 2² = 920685553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920685553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37682 + ... + 57107.

It is an arithmetic number, because the mean of its divisors is an integer number (125691540).

Almost surely, 2^920685557 is an apocalyptic number.

It is an amenable number.

920685557 is a deficient number, since it is larger than the sum of its proper divisors (84846763).

920685557 is a wasteful number, since it uses less digits than its factorization.

920685557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95683.

The product of its (nonzero) digits is 756000, while the sum is 47.

The square root of 920685557 is about 30342.8007441634. The cubic root of 920685557 is about 972.8303477872.

The spelling of 920685557 in words is "nine hundred twenty million, six hundred eighty-five thousand, five hundred fifty-seven".