350381821 has 2 divisors, whose sum is σ = 350381822. Its totient is φ = 350381820.

The previous prime is 350381819. The next prime is 350381861. The reversal of 350381821 is 128183053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185259321 + 165122500 = 13611^2 + 12850^2 .

It is a cyclic number.

It is not a de Polignac number, because 350381821 - 2¹ = 350381819 is a prime.

Together with 350381819, 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 (350381861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175190910 + 175190911.

It is an arithmetic number, because the mean of its divisors is an integer number (175190911).

Almost surely, 2^350381821 is an apocalyptic number.

It is an amenable number.

350381821 is a deficient number, since it is larger than the sum of its proper divisors (1).

350381821 is an equidigital number, since it uses as much as digits as its factorization.

350381821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 350381821 is about 18718.4887477595. The cubic root of 350381821 is about 704.9860473741.

The spelling of 350381821 in words is "three hundred fifty million, three hundred eighty-one thousand, eight hundred twenty-one".