387698513 has 2 divisors, whose sum is σ = 387698514. Its totient is φ = 387698512.

The previous prime is 387698497. The next prime is 387698533. The reversal of 387698513 is 315896783.

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., 373919569 + 13778944 = 19337^2 + 3712^2 .

It is an emirp because it is prime and its reverse (315896783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387698513 - 2⁴ = 387698497 is a prime.

It is a super-2 number, since 2×387698513² = 300620273964822338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (387698533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193849256 + 193849257.

It is an arithmetic number, because the mean of its divisors is an integer number (193849257).

Almost surely, 2^387698513 is an apocalyptic number.

It is an amenable number.

387698513 is a deficient number, since it is larger than the sum of its proper divisors (1).

387698513 is an equidigital number, since it uses as much as digits as its factorization.

387698513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 387698513 is about 19690.0612746634. The cubic root of 387698513 is about 729.1743420377.

The spelling of 387698513 in words is "three hundred eighty-seven million, six hundred ninety-eight thousand, five hundred thirteen".