1922121309 has 8 divisors (see below), whose sum is σ = 2563302112. Its totient is φ = 1281177360.

The previous prime is 1922121283. The next prime is 1922121319. The reversal of 1922121309 is 9031212291.

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

It is not a de Polignac number, because 1922121309 - 2⁷ = 1922121181 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 (1922121319) 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, 39322 + ... + 73419.

It is an arithmetic number, because the mean of its divisors is an integer number (320412764).

Almost surely, 2^1922121309 is an apocalyptic number.

It is an amenable number.

1922121309 is a deficient number, since it is larger than the sum of its proper divisors (641180803).

1922121309 is a wasteful number, since it uses less digits than its factorization.

1922121309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118427.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1922121309 is about 43842.0039345831. The cubic root of 1922121309 is about 1243.3505700391.

The spelling of 1922121309 in words is "one billion, nine hundred twenty-two million, one hundred twenty-one thousand, three hundred nine".