9887355957 has 4 divisors (see below), whose sum is σ = 13183141280. Its totient is φ = 6591570636.

The previous prime is 9887355917. The next prime is 9887355967. The reversal of 9887355957 is 7595537889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7595537889 = 3 ⋅2531845963.

It is not a de Polignac number, because 9887355957 - 2¹⁸ = 9887093813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9887355917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647892657 + ... + 1647892662.

It is an arithmetic number, because the mean of its divisors is an integer number (3295785320).

Almost surely, 2^9887355957 is an apocalyptic number.

It is an amenable number.

9887355957 is a deficient number, since it is larger than the sum of its proper divisors (3295785323).

9887355957 is a wasteful number, since it uses less digits than its factorization.

9887355957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295785322.

The product of its digits is 95256000, while the sum is 66.

The square root of 9887355957 is about 99435.1847034037. The cubic root of 9887355957 is about 2146.3146496772.

The spelling of 9887355957 in words is "nine billion, eight hundred eighty-seven million, three hundred fifty-five thousand, nine hundred fifty-seven".