507723961 has 4 divisors (see below), whose sum is σ = 507780900. Its totient is φ = 507667024.

The previous prime is 507723943. The next prime is 507723971. The reversal of 507723961 is 169327705.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 169327705 = 5 ⋅33865541.

It can be written as a sum of positive squares in 2 ways, for example, as 184443561 + 323280400 = 13581^2 + 17980^2 .

It is a cyclic number.

It is not a de Polignac number, because 507723961 - 2⁵ = 507723929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507723971) 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 in 3 ways as a sum of consecutive naturals, for example, 11866 + ... + 34003.

It is an arithmetic number, because the mean of its divisors is an integer number (126945225).

Almost surely, 2^507723961 is an apocalyptic number.

It is an amenable number.

507723961 is a deficient number, since it is larger than the sum of its proper divisors (56939).

507723961 is a wasteful number, since it uses less digits than its factorization.

507723961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56938.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 507723961 is about 22532.7308819859. The cubic root of 507723961 is about 797.7666674380.

The spelling of 507723961 in words is "five hundred seven million, seven hundred twenty-three thousand, nine hundred sixty-one".