353921 has 2 divisors, whose sum is σ = 353922. Its totient is φ = 353920.

The previous prime is 353917. The next prime is 353929. The reversal of 353921 is 129353.

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., 270400 + 83521 = 520^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 353921 - 2² = 353917 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 353921.

It is not a weakly prime, because it can be changed into another prime (353929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176960 + 176961.

It is an arithmetic number, because the mean of its divisors is an integer number (176961).

2³⁵³⁹²¹ is an apocalyptic number.

It is an amenable number.

353921 is a deficient number, since it is larger than the sum of its proper divisors (1).

353921 is an equidigital number, since it uses as much as digits as its factorization.

353921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 23.

The square root of 353921 is about 594.9125986227. The cubic root of 353921 is about 70.7351769235.

The spelling of 353921 in words is "three hundred fifty-three thousand, nine hundred twenty-one".