350166821 has 2 divisors, whose sum is σ = 350166822. Its totient is φ = 350166820.

The previous prime is 350166797. The next prime is 350166823. The reversal of 350166821 is 128661053.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231465796 + 118701025 = 15214^2 + 10895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-350166821 is a prime.

It is a Sophie Germain prime.

Together with 350166823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (350166823) 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, 175083410 + 175083411.

It is an arithmetic number, because the mean of its divisors is an integer number (175083411).

Almost surely, 2^350166821 is an apocalyptic number.

It is an amenable number.

350166821 is a deficient number, since it is larger than the sum of its proper divisors (1).

350166821 is an equidigital number, since it uses as much as digits as its factorization.

350166821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 350166821 is about 18712.7448814972. The cubic root of 350166821 is about 704.8418208912.

The spelling of 350166821 in words is "three hundred fifty million, one hundred sixty-six thousand, eight hundred twenty-one".