506551789 has 2 divisors, whose sum is σ = 506551790. Its totient is φ = 506551788.

The previous prime is 506551781. The next prime is 506551847. The reversal of 506551789 is 987155605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505800100 + 751689 = 22490^2 + 867^2 .

It is a cyclic number.

It is not a de Polignac number, because 506551789 - 2³ = 506551781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506551781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253275894 + 253275895.

It is an arithmetic number, because the mean of its divisors is an integer number (253275895).

Almost surely, 2^506551789 is an apocalyptic number.

It is an amenable number.

506551789 is a deficient number, since it is larger than the sum of its proper divisors (1).

506551789 is an equidigital number, since it uses as much as digits as its factorization.

506551789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 46.

The square root of 506551789 is about 22506.7054230511. The cubic root of 506551789 is about 797.1522651400.

The spelling of 506551789 in words is "five hundred six million, five hundred fifty-one thousand, seven hundred eighty-nine".