354491609 has 2 divisors, whose sum is σ = 354491610. Its totient is φ = 354491608.

The previous prime is 354491591. The next prime is 354491611. The reversal of 354491609 is 906194453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354192400 + 299209 = 18820^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 354491609 - 2¹⁶ = 354426073 is a prime.

Together with 354491611, 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 (354491639) 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, 177245804 + 177245805.

It is an arithmetic number, because the mean of its divisors is an integer number (177245805).

Almost surely, 2^354491609 is an apocalyptic number.

It is an amenable number.

354491609 is a deficient number, since it is larger than the sum of its proper divisors (1).

354491609 is an equidigital number, since it uses as much as digits as its factorization.

354491609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 354491609 is about 18827.9475514460. The cubic root of 354491609 is about 707.7317076645.

The spelling of 354491609 in words is "three hundred fifty-four million, four hundred ninety-one thousand, six hundred nine".