513357987997 has 2 divisors, whose sum is σ = 513357987998. Its totient is φ = 513357987996.

The previous prime is 513357987971. The next prime is 513357988027. The reversal of 513357987997 is 799789753315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511159222116 + 2198765881 = 714954^2 + 46891^2 .

It is a cyclic number.

It is not a de Polignac number, because 513357987997 - 2¹¹ = 513357985949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513357987097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256678993998 + 256678993999.

It is an arithmetic number, because the mean of its divisors is an integer number (256678993999).

Almost surely, 2^513357987997 is an apocalyptic number.

It is an amenable number.

513357987997 is a deficient number, since it is larger than the sum of its proper divisors (1).

513357987997 is an equidigital number, since it uses as much as digits as its factorization.

513357987997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450084600, while the sum is 73.

The spelling of 513357987997 in words is "five hundred thirteen billion, three hundred fifty-seven million, nine hundred eighty-seven thousand, nine hundred ninety-seven".