163437121 has 2 divisors, whose sum is σ = 163437122. Its totient is φ = 163437120.

The previous prime is 163437067. The next prime is 163437161. The reversal of 163437121 is 121734361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108972721 + 54464400 = 10439^2 + 7380^2 .

It is a cyclic number.

It is not a de Polignac number, because 163437121 - 2¹⁹ = 162912833 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163437121.

It is not a weakly prime, because it can be changed into another prime (163437161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81718560 + 81718561.

It is an arithmetic number, because the mean of its divisors is an integer number (81718561).

Almost surely, 2^163437121 is an apocalyptic number.

It is an amenable number.

163437121 is a deficient number, since it is larger than the sum of its proper divisors (1).

163437121 is an equidigital number, since it uses as much as digits as its factorization.

163437121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 163437121 is about 12784.2528526308. The cubic root of 163437121 is about 546.7434234792.

The spelling of 163437121 in words is "one hundred sixty-three million, four hundred thirty-seven thousand, one hundred twenty-one".