921820134 has 8 divisors (see below), whose sum is σ = 1843640280. Its totient is φ = 307273376.

The previous prime is 921820099. The next prime is 921820139. The reversal of 921820134 is 431028129.

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

921820134 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921820139) 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, 76818339 + ... + 76818350.

It is an arithmetic number, because the mean of its divisors is an integer number (230455035).

Almost surely, 2^921820134 is an apocalyptic number.

921820134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921820134 is a wasteful number, since it uses less digits than its factorization.

921820134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153636694.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 921820134 is about 30361.4909712945. The cubic root of 921820134 is about 973.2297957307.

The spelling of 921820134 in words is "nine hundred twenty-one million, eight hundred twenty thousand, one hundred thirty-four".