1587888117 has 14 divisors (see below), whose sum is σ = 2380744182. Its totient is φ = 1058591592.

The previous prime is 1587888101. The next prime is 1587888119. The reversal of 1587888117 is 7118887851.

It can be written as a sum of positive squares in only one way, i.e., 1434970161 + 152917956 = 37881^2 + 12366^2 .

It is not a de Polignac number, because 1587888117 - 2⁴ = 1587888101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587888119) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1088358 + ... + 1089815.

Almost surely, 2^1587888117 is an apocalyptic number.

It is an amenable number.

1587888117 is a deficient number, since it is larger than the sum of its proper divisors (792856065).

1587888117 is an frugal number, since it uses more digits than its factorization.

1587888117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178191 (or 2178176 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 54.

The square root of 1587888117 is about 39848.3138539136. The cubic root of 1587888117 is about 1166.6483367551.

The spelling of 1587888117 in words is "one billion, five hundred eighty-seven million, eight hundred eighty-eight thousand, one hundred seventeen".