506687501 has 2 divisors, whose sum is σ = 506687502. Its totient is φ = 506687500.

The previous prime is 506687477. The next prime is 506687543. The reversal of 506687501 is 105786605.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354757225 + 151930276 = 18835^2 + 12326^2 .

It is a cyclic number.

It is not a de Polignac number, because 506687501 - 2⁶ = 506687437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506687561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253343750 + 253343751.

It is an arithmetic number, because the mean of its divisors is an integer number (253343751).

Almost surely, 2^506687501 is an apocalyptic number.

It is an amenable number.

506687501 is a deficient number, since it is larger than the sum of its proper divisors (1).

506687501 is an equidigital number, since it uses as much as digits as its factorization.

506687501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 506687501 is about 22509.7201448619. The cubic root of 506687501 is about 797.2234480350.

The spelling of 506687501 in words is "five hundred six million, six hundred eighty-seven thousand, five hundred one".