163191949 has 2 divisors, whose sum is σ = 163191950. Its totient is φ = 163191948.

The previous prime is 163191907. The next prime is 163191971. The reversal of 163191949 is 949191361.

163191949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139358025 + 23833924 = 11805^2 + 4882^2 .

It is an emirp because it is prime and its reverse (949191361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163191949 - 2¹⁵ = 163159181 is a prime.

It is a super-2 number, since 2×163191949² = 53263224436837202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163191979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81595974 + 81595975.

It is an arithmetic number, because the mean of its divisors is an integer number (81595975).

Almost surely, 2^163191949 is an apocalyptic number.

It is an amenable number.

163191949 is a deficient number, since it is larger than the sum of its proper divisors (1).

163191949 is an equidigital number, since it uses as much as digits as its factorization.

163191949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 43.

The square root of 163191949 is about 12774.6604260152. The cubic root of 163191949 is about 546.4698967527.

The spelling of 163191949 in words is "one hundred sixty-three million, one hundred ninety-one thousand, nine hundred forty-nine".