163219993 has 2 divisors, whose sum is σ = 163219994. Its totient is φ = 163219992.

The previous prime is 163219981. The next prime is 163220003. The reversal of 163219993 is 399912361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93547584 + 69672409 = 9672^2 + 8347^2 .

It is a cyclic number.

It is not a de Polignac number, because 163219993 - 2²⁵ = 129665561 is a prime.

It is a super-2 number, since 2×163219993² = 53281532229840098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163219933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81609996 + 81609997.

It is an arithmetic number, because the mean of its divisors is an integer number (81609997).

Almost surely, 2^163219993 is an apocalyptic number.

It is an amenable number.

163219993 is a deficient number, since it is larger than the sum of its proper divisors (1).

163219993 is an equidigital number, since it uses as much as digits as its factorization.

163219993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 43.

The square root of 163219993 is about 12775.7580205638. The cubic root of 163219993 is about 546.5011979783.

The spelling of 163219993 in words is "one hundred sixty-three million, two hundred nineteen thousand, nine hundred ninety-three".