513269749 has 2 divisors, whose sum is σ = 513269750. Its totient is φ = 513269748.

The previous prime is 513269747. The next prime is 513269767. The reversal of 513269749 is 947962315.

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., 267093649 + 246176100 = 16343^2 + 15690^2 .

It is a cyclic number.

It is not a de Polignac number, because 513269749 - 2¹ = 513269747 is a prime.

It is a super-3 number, since 3×513269749³ (a number of 27 digits) contains 333 as substring.

Together with 513269747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 513269699 and 513269708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513269741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256634874 + 256634875.

It is an arithmetic number, because the mean of its divisors is an integer number (256634875).

Almost surely, 2^513269749 is an apocalyptic number.

It is an amenable number.

513269749 is a deficient number, since it is larger than the sum of its proper divisors (1).

513269749 is an equidigital number, since it uses as much as digits as its factorization.

513269749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 513269749 is about 22655.4573778593. The cubic root of 513269749 is about 800.6607816634.

It can be divided in two parts, 51326 and 9749, that added together give a triangular number (61075 = T₃₄₉).

The spelling of 513269749 in words is "five hundred thirteen million, two hundred sixty-nine thousand, seven hundred forty-nine".