354233921 has 2 divisors, whose sum is σ = 354233922. Its totient is φ = 354233920.

The previous prime is 354233863. The next prime is 354233923. The reversal of 354233921 is 129332453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352087696 + 2146225 = 18764^2 + 1465^2 .

It is an emirp because it is prime and its reverse (129332453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354233921 - 2⁶ = 354233857 is a prime.

It is a super-3 number, since 3×354233921³ (a number of 27 digits) contains 333 as substring.

Together with 354233923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (354233923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177116960 + 177116961.

It is an arithmetic number, because the mean of its divisors is an integer number (177116961).

Almost surely, 2^354233921 is an apocalyptic number.

It is an amenable number.

354233921 is a deficient number, since it is larger than the sum of its proper divisors (1).

354233921 is an equidigital number, since it uses as much as digits as its factorization.

354233921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 354233921 is about 18821.1030760686. The cubic root of 354233921 is about 707.5601773451.

The spelling of 354233921 in words is "three hundred fifty-four million, two hundred thirty-three thousand, nine hundred twenty-one".