503078161 has 4 divisors (see below), whose sum is σ = 532671012. Its totient is φ = 473485312.

The previous prime is 503078153. The next prime is 503078179. The reversal of 503078161 is 161870305.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 425638161 + 77440000 = 20631^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 503078161 - 2³ = 503078153 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503078131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14796400 + ... + 14796433.

It is an arithmetic number, because the mean of its divisors is an integer number (133167753).

Almost surely, 2^503078161 is an apocalyptic number.

It is an amenable number.

503078161 is a deficient number, since it is larger than the sum of its proper divisors (29592851).

503078161 is a wasteful number, since it uses less digits than its factorization.

503078161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29592850.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 503078161 is about 22429.4039376886. The cubic root of 503078161 is about 795.3259536512.

The spelling of 503078161 in words is "five hundred three million, seventy-eight thousand, one hundred sixty-one".