163974761 has 2 divisors, whose sum is σ = 163974762. Its totient is φ = 163974760.

The previous prime is 163974743. The next prime is 163974773. The reversal of 163974761 is 167479361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143544361 + 20430400 = 11981^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 163974761 - 2¹⁰ = 163973737 is a prime.

It is not a weakly prime, because it can be changed into another prime (163974721) 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, 81987380 + 81987381.

It is an arithmetic number, because the mean of its divisors is an integer number (81987381).

Almost surely, 2^163974761 is an apocalyptic number.

It is an amenable number.

163974761 is a deficient number, since it is larger than the sum of its proper divisors (1).

163974761 is an equidigital number, since it uses as much as digits as its factorization.

163974761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 163974761 is about 12805.2630195557. The cubic root of 163974761 is about 547.3422866070.

The spelling of 163974761 in words is "one hundred sixty-three million, nine hundred seventy-four thousand, seven hundred sixty-one".