920308087 has 4 divisors (see below), whose sum is σ = 920649280. Its totient is φ = 919966896.

The previous prime is 920308079. The next prime is 920308091. The reversal of 920308087 is 780803029.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780803029 = 3917 ⋅199337.

It is a cyclic number.

It is not a de Polignac number, because 920308087 - 2³ = 920308079 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 (920308057) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 166518 + ... + 171955.

It is an arithmetic number, because the mean of its divisors is an integer number (230162320).

Almost surely, 2^920308087 is an apocalyptic number.

920308087 is a deficient number, since it is larger than the sum of its proper divisors (341193).

920308087 is a wasteful number, since it uses less digits than its factorization.

920308087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341192.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 920308087 is about 30336.5800148929. The cubic root of 920308087 is about 972.6973800349.

The spelling of 920308087 in words is "nine hundred twenty million, three hundred eight thousand, eighty-seven".