354501821 has 4 divisors (see below), whose sum is σ = 356338812. Its totient is φ = 352664832.

The previous prime is 354501809. The next prime is 354501827. The reversal of 354501821 is 128105453.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250747225 + 103754596 = 15835^2 + 10186^2 .

It is a cyclic number.

It is not a de Polignac number, because 354501821 - 2¹⁴ = 354485437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354501827) 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 in 3 ways as a sum of consecutive naturals, for example, 918206 + ... + 918591.

It is an arithmetic number, because the mean of its divisors is an integer number (89084703).

Almost surely, 2^354501821 is an apocalyptic number.

It is an amenable number.

354501821 is a deficient number, since it is larger than the sum of its proper divisors (1836991).

354501821 is a wasteful number, since it uses less digits than its factorization.

354501821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836990.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 354501821 is about 18828.2187420903. The cubic root of 354501821 is about 707.7385035816.

The spelling of 354501821 in words is "three hundred fifty-four million, five hundred one thousand, eight hundred twenty-one".