5209665187 has 2 divisors, whose sum is σ = 5209665188. Its totient is φ = 5209665186.

The previous prime is 5209665101. The next prime is 5209665203. The reversal of 5209665187 is 7815669025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5209665187 - 2²³ = 5201276579 is a prime.

It is a super-2 number, since 2×5209665187² = 54281222721279489938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5209665187.

It is not a weakly prime, because it can be changed into another prime (5209662187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2604832593 + 2604832594.

It is an arithmetic number, because the mean of its divisors is an integer number (2604832594).

Almost surely, 2^5209665187 is an apocalyptic number.

5209665187 is a deficient number, since it is larger than the sum of its proper divisors (1).

5209665187 is an equidigital number, since it uses as much as digits as its factorization.

5209665187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 5209665187 is about 72178.0104117591. The cubic root of 5209665187 is about 1733.5509262050.

The spelling of 5209665187 in words is "five billion, two hundred nine million, six hundred sixty-five thousand, one hundred eighty-seven".