500136691 has 2 divisors, whose sum is σ = 500136692. Its totient is φ = 500136690.

The previous prime is 500136683. The next prime is 500136727. The reversal of 500136691 is 196631005.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 500136691 - 2³ = 500136683 is a prime.

It is not a weakly prime, because it can be changed into another prime (500136641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250068345 + 250068346.

It is an arithmetic number, because the mean of its divisors is an integer number (250068346).

Almost surely, 2^500136691 is an apocalyptic number.

500136691 is a deficient number, since it is larger than the sum of its proper divisors (1).

500136691 is an equidigital number, since it uses as much as digits as its factorization.

500136691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 500136691 is about 22363.7360698073. The cubic root of 500136691 is about 793.7728472065.

Adding to 500136691 its reverse (196631005), we get a palindrome (696767696).

The spelling of 500136691 in words is "five hundred million, one hundred thirty-six thousand, six hundred ninety-one".