353847421 has 2 divisors, whose sum is σ = 353847422. Its totient is φ = 353847420.

The previous prime is 353847419. The next prime is 353847427. The reversal of 353847421 is 124748353.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341695225 + 12152196 = 18485^2 + 3486^2 .

It is an emirp because it is prime and its reverse (124748353) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 353847421 - 2¹ = 353847419 is a prime.

Together with 353847419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353847427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176923710 + 176923711.

It is an arithmetic number, because the mean of its divisors is an integer number (176923711).

Almost surely, 2^353847421 is an apocalyptic number.

It is an amenable number.

353847421 is a deficient number, since it is larger than the sum of its proper divisors (1).

353847421 is an equidigital number, since it uses as much as digits as its factorization.

353847421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 353847421 is about 18810.8325440423. The cubic root of 353847421 is about 707.3027471431.

The spelling of 353847421 in words is "three hundred fifty-three million, eight hundred forty-seven thousand, four hundred twenty-one".