513307396949 has 2 divisors, whose sum is σ = 513307396950. Its totient is φ = 513307396948.

The previous prime is 513307396883. The next prime is 513307396981. The reversal of 513307396949 is 949693703315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463191858724 + 50115538225 = 680582^2 + 223865^2 .

It is a cyclic number.

It is not a de Polignac number, because 513307396949 - 2¹² = 513307392853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513307396549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256653698474 + 256653698475.

It is an arithmetic number, because the mean of its divisors is an integer number (256653698475).

Almost surely, 2^513307396949 is an apocalyptic number.

It is an amenable number.

513307396949 is a deficient number, since it is larger than the sum of its proper divisors (1).

513307396949 is an equidigital number, since it uses as much as digits as its factorization.

513307396949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16533720, while the sum is 59.

The spelling of 513307396949 in words is "five hundred thirteen billion, three hundred seven million, three hundred ninety-six thousand, nine hundred forty-nine".