1915055887 has 2 divisors, whose sum is σ = 1915055888. Its totient is φ = 1915055886.

The previous prime is 1915055881. The next prime is 1915055897. The reversal of 1915055887 is 7885505191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1915055887 - 2¹⁵ = 1915023119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1915055887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1915055881) 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, 957527943 + 957527944.

It is an arithmetic number, because the mean of its divisors is an integer number (957527944).

Almost surely, 2^1915055887 is an apocalyptic number.

1915055887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1915055887 is an equidigital number, since it uses as much as digits as its factorization.

1915055887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 49.

The square root of 1915055887 is about 43761.3515216338. The cubic root of 1915055887 is about 1241.8252444664.

The spelling of 1915055887 in words is "one billion, nine hundred fifteen million, fifty-five thousand, eight hundred eighty-seven".