923122021 has 2 divisors, whose sum is σ = 923122022. Its totient is φ = 923122020.

The previous prime is 923121959. The next prime is 923122051. The reversal of 923122021 is 120221329.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900900225 + 22221796 = 30015^2 + 4714^2 .

It is an emirp because it is prime and its reverse (120221329) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-923122021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 923121983 and 923122001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923122051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461561010 + 461561011.

It is an arithmetic number, because the mean of its divisors is an integer number (461561011).

Almost surely, 2^923122021 is an apocalyptic number.

It is an amenable number.

923122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

923122021 is an equidigital number, since it uses as much as digits as its factorization.

923122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 923122021 is about 30382.9231806290. The cubic root of 923122021 is about 973.6877445075.

The spelling of 923122021 in words is "nine hundred twenty-three million, one hundred twenty-two thousand, twenty-one".