921554339 has 2 divisors, whose sum is σ = 921554340. Its totient is φ = 921554338.

The previous prime is 921554323. The next prime is 921554341. The reversal of 921554339 is 933455129.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921554339 - 2⁴ = 921554323 is a prime.

It is a Sophie Germain prime.

Together with 921554341, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 921554296 and 921554305.

It is not a weakly prime, because it can be changed into another prime (921554399) 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 as a sum of consecutive naturals, namely, 460777169 + 460777170.

It is an arithmetic number, because the mean of its divisors is an integer number (460777170).

Almost surely, 2^921554339 is an apocalyptic number.

921554339 is a deficient number, since it is larger than the sum of its proper divisors (1).

921554339 is an equidigital number, since it uses as much as digits as its factorization.

921554339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

The square root of 921554339 is about 30357.1134826749. The cubic root of 921554339 is about 973.1362473003.

The spelling of 921554339 in words is "nine hundred twenty-one million, five hundred fifty-four thousand, three hundred thirty-nine".