507688387 has 2 divisors, whose sum is σ = 507688388. Its totient is φ = 507688386.

The previous prime is 507688381. The next prime is 507688403. The reversal of 507688387 is 783886705.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-507688387 is a prime.

It is not a weakly prime, because it can be changed into another prime (507688381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253844193 + 253844194.

It is an arithmetic number, because the mean of its divisors is an integer number (253844194).

Almost surely, 2^507688387 is an apocalyptic number.

507688387 is a deficient number, since it is larger than the sum of its proper divisors (1).

507688387 is an equidigital number, since it uses as much as digits as its factorization.

507688387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 507688387 is about 22531.9414831479. The cubic root of 507688387 is about 797.7480349944.

The spelling of 507688387 in words is "five hundred seven million, six hundred eighty-eight thousand, three hundred eighty-seven".