501136789 has 2 divisors, whose sum is σ = 501136790. Its totient is φ = 501136788.

The previous prime is 501136787. The next prime is 501136871. The reversal of 501136789 is 987631105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451222564 + 49914225 = 21242^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 501136789 - 2¹ = 501136787 is a prime.

It is a super-2 number, since 2×501136789² = 502276162578461042, which contains 22 as substring.

Together with 501136787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501136781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250568394 + 250568395.

It is an arithmetic number, because the mean of its divisors is an integer number (250568395).

Almost surely, 2^501136789 is an apocalyptic number.

It is an amenable number.

501136789 is a deficient number, since it is larger than the sum of its proper divisors (1).

501136789 is an equidigital number, since it uses as much as digits as its factorization.

501136789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 501136789 is about 22386.0847179671. The cubic root of 501136789 is about 794.3015840480.

The spelling of 501136789 in words is "five hundred one million, one hundred thirty-six thousand, seven hundred eighty-nine".