163787947 has 2 divisors, whose sum is σ = 163787948. Its totient is φ = 163787946.

The previous prime is 163787941. The next prime is 163787951. The reversal of 163787947 is 749787361.

163787947 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 (749787361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163787947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163787894 and 163787903.

It is not a weakly prime, because it can be changed into another prime (163787941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81893973 + 81893974.

It is an arithmetic number, because the mean of its divisors is an integer number (81893974).

Almost surely, 2^163787947 is an apocalyptic number.

163787947 is a deficient number, since it is larger than the sum of its proper divisors (1).

163787947 is an equidigital number, since it uses as much as digits as its factorization.

163787947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 52.

The square root of 163787947 is about 12797.9665181622. The cubic root of 163787947 is about 547.1343479848.

The spelling of 163787947 in words is "one hundred sixty-three million, seven hundred eighty-seven thousand, nine hundred forty-seven".