513607987 has 2 divisors, whose sum is σ = 513607988. Its totient is φ = 513607986.

The previous prime is 513607973. The next prime is 513608003. The reversal of 513607987 is 789706315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513607987 - 2²⁷ = 379390259 is a prime.

It is not a weakly prime, because it can be changed into another prime (513607967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256803993 + 256803994.

It is an arithmetic number, because the mean of its divisors is an integer number (256803994).

Almost surely, 2^513607987 is an apocalyptic number.

513607987 is a deficient number, since it is larger than the sum of its proper divisors (1).

513607987 is an equidigital number, since it uses as much as digits as its factorization.

513607987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 513607987 is about 22662.9209723725. The cubic root of 513607987 is about 800.8366180121.

The spelling of 513607987 in words is "five hundred thirteen million, six hundred seven thousand, nine hundred eighty-seven".