503870161 has 2 divisors, whose sum is σ = 503870162. Its totient is φ = 503870160.

The previous prime is 503870149. The next prime is 503870183. The reversal of 503870161 is 161078305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346518225 + 157351936 = 18615^2 + 12544^2 .

It is a cyclic number.

It is not a de Polignac number, because 503870161 - 2⁹ = 503869649 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (503870111) 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, 251935080 + 251935081.

It is an arithmetic number, because the mean of its divisors is an integer number (251935081).

Almost surely, 2^503870161 is an apocalyptic number.

It is an amenable number.

503870161 is a deficient number, since it is larger than the sum of its proper divisors (1).

503870161 is an equidigital number, since it uses as much as digits as its factorization.

503870161 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 31.

The square root of 503870161 is about 22447.0523900133. The cubic root of 503870161 is about 795.7430975079.

The spelling of 503870161 in words is "five hundred three million, eight hundred seventy thousand, one hundred sixty-one".