506991349 has 2 divisors, whose sum is σ = 506991350. Its totient is φ = 506991348.

The previous prime is 506991343. The next prime is 506991367. The reversal of 506991349 is 943199605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263412900 + 243578449 = 16230^2 + 15607^2 .

It is a cyclic number.

It is not a de Polignac number, because 506991349 - 2¹³ = 506983157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 506991299 and 506991308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506991343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253495674 + 253495675.

It is an arithmetic number, because the mean of its divisors is an integer number (253495675).

Almost surely, 2^506991349 is an apocalyptic number.

It is an amenable number.

506991349 is a deficient number, since it is larger than the sum of its proper divisors (1).

506991349 is an equidigital number, since it uses as much as digits as its factorization.

506991349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 506991349 is about 22516.4683953767. The cubic root of 506991349 is about 797.3827746055.

The spelling of 506991349 in words is "five hundred six million, nine hundred ninety-one thousand, three hundred forty-nine".