163051961 has 2 divisors, whose sum is σ = 163051962. Its totient is φ = 163051960.

The previous prime is 163051951. The next prime is 163051969. The reversal of 163051961 is 169150361.

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., 96727225 + 66324736 = 9835^2 + 8144^2 .

It is an emirp because it is prime and its reverse (169150361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163051961 - 2⁶ = 163051897 is a prime.

It is not a weakly prime, because it can be changed into another prime (163051969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81525980 + 81525981.

It is an arithmetic number, because the mean of its divisors is an integer number (81525981).

Almost surely, 2^163051961 is an apocalyptic number.

It is an amenable number.

163051961 is a deficient number, since it is larger than the sum of its proper divisors (1).

163051961 is an equidigital number, since it uses as much as digits as its factorization.

163051961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 163051961 is about 12769.1801224668. The cubic root of 163051961 is about 546.3135959205.

The spelling of 163051961 in words is "one hundred sixty-three million, fifty-one thousand, nine hundred sixty-one".