161518703 has 2 divisors, whose sum is σ = 161518704. Its totient is φ = 161518702.

The previous prime is 161518663. The next prime is 161518723. The reversal of 161518703 is 307815161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161518703 - 2⁸ = 161518447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161518703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161518723) 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, 80759351 + 80759352.

It is an arithmetic number, because the mean of its divisors is an integer number (80759352).

Almost surely, 2^161518703 is an apocalyptic number.

161518703 is a deficient number, since it is larger than the sum of its proper divisors (1).

161518703 is an equidigital number, since it uses as much as digits as its factorization.

161518703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 161518703 is about 12709.0008655283. Note that the first 3 decimals coincide. The cubic root of 161518703 is about 544.5957814090.

The spelling of 161518703 in words is "one hundred sixty-one million, five hundred eighteen thousand, seven hundred three".