163954799 has 2 divisors, whose sum is σ = 163954800. Its totient is φ = 163954798.

The previous prime is 163954771. The next prime is 163954801. The reversal of 163954799 is 997459361.

It is a happy number.

163954799 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 is an emirp because it is prime and its reverse (997459361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163954799 - 2⁸ = 163954543 is a prime.

It is a super-2 number, since 2×163954799² = 53762352230260802, which contains 22 as substring.

Together with 163954801, it forms a pair of twin primes.

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 163954799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163954099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81977399 + 81977400.

It is an arithmetic number, because the mean of its divisors is an integer number (81977400).

Almost surely, 2^163954799 is an apocalyptic number.

163954799 is a deficient number, since it is larger than the sum of its proper divisors (1).

163954799 is an equidigital number, since it uses as much as digits as its factorization.

163954799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The square root of 163954799 is about 12804.4835506943. The cubic root of 163954799 is about 547.3200748754.

It can be divided in two parts, 1639547 and 99, that multiplied together give a triangular number (162315153 = T₁₈₀₁₇).

The spelling of 163954799 in words is "one hundred sixty-three million, nine hundred fifty-four thousand, seven hundred ninety-nine".