353406561 has 4 divisors (see below), whose sum is σ = 471208752. Its totient is φ = 235604372.

The previous prime is 353406533. The next prime is 353406577. The reversal of 353406561 is 165604353.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165604353 = 3 ⋅55201451.

It is a cyclic number.

It is not a de Polignac number, because 353406561 - 2²² = 349212257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (353406161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58901091 + ... + 58901096.

It is an arithmetic number, because the mean of its divisors is an integer number (117802188).

Almost surely, 2^353406561 is an apocalyptic number.

It is an amenable number.

353406561 is a deficient number, since it is larger than the sum of its proper divisors (117802191).

353406561 is a wasteful number, since it uses less digits than its factorization.

353406561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117802190.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 353406561 is about 18799.1106438576. The cubic root of 353406561 is about 707.0088812373.

The spelling of 353406561 in words is "three hundred fifty-three million, four hundred six thousand, five hundred sixty-one".