352685821 has 2 divisors, whose sum is σ = 352685822. Its totient is φ = 352685820.

The previous prime is 352685807. The next prime is 352685843. The reversal of 352685821 is 128586253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244296900 + 108388921 = 15630^2 + 10411^2 .

It is an emirp because it is prime and its reverse (128586253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 352685821 - 2⁷ = 352685693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (352685881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176342910 + 176342911.

It is an arithmetic number, because the mean of its divisors is an integer number (176342911).

Almost surely, 2^352685821 is an apocalyptic number.

It is an amenable number.

352685821 is a deficient number, since it is larger than the sum of its proper divisors (1).

352685821 is an equidigital number, since it uses as much as digits as its factorization.

352685821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 352685821 is about 18779.9313364027. The cubic root of 352685821 is about 706.5279277246.

The spelling of 352685821 in words is "three hundred fifty-two million, six hundred eighty-five thousand, eight hundred twenty-one".