513687390 has 16 divisors (see below), whose sum is σ = 1232849808. Its totient is φ = 136983296.

The previous prime is 513687379. The next prime is 513687397. The reversal of 513687390 is 93786315.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513687397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8561427 + ... + 8561486.

It is an arithmetic number, because the mean of its divisors is an integer number (77053113).

Almost surely, 2^513687390 is an apocalyptic number.

513687390 is an abundant number, since it is smaller than the sum of its proper divisors (719162418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513687390 is a wasteful number, since it uses less digits than its factorization.

513687390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17122923.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 513687390 is about 22664.6727309264. The cubic root of 513687390 is about 800.8778852528.

The spelling of 513687390 in words is "five hundred thirteen million, six hundred eighty-seven thousand, three hundred ninety".