163821037 has 2 divisors, whose sum is σ = 163821038. Its totient is φ = 163821036.

The previous prime is 163821017. The next prime is 163821041. The reversal of 163821037 is 730128361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95824521 + 67996516 = 9789^2 + 8246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163821037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163821017) 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, 81910518 + 81910519.

It is an arithmetic number, because the mean of its divisors is an integer number (81910519).

Almost surely, 2^163821037 is an apocalyptic number.

It is an amenable number.

163821037 is a deficient number, since it is larger than the sum of its proper divisors (1).

163821037 is an equidigital number, since it uses as much as digits as its factorization.

163821037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 163821037 is about 12799.2592363777. The cubic root of 163821037 is about 547.1711912666.

Adding to 163821037 its reverse (730128361), we get a palindrome (893949398).

The spelling of 163821037 in words is "one hundred sixty-three million, eight hundred twenty-one thousand, thirty-seven".