163921436927 has 2 divisors, whose sum is σ = 163921436928. Its totient is φ = 163921436926.

The previous prime is 163921436923. The next prime is 163921436951. The reversal of 163921436927 is 729634129361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163921436927 - 2² = 163921436923 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163921436923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81960718463 + 81960718464.

It is an arithmetic number, because the mean of its divisors is an integer number (81960718464).

Almost surely, 2^163921436927 is an apocalyptic number.

163921436927 is a deficient number, since it is larger than the sum of its proper divisors (1).

163921436927 is an equidigital number, since it uses as much as digits as its factorization.

163921436927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 53.

The spelling of 163921436927 in words is "one hundred sixty-three billion, nine hundred twenty-one million, four hundred thirty-six thousand, nine hundred twenty-seven".