127921887 has 12 divisors (see below), whose sum is σ = 185284320. Its totient is φ = 85046688.

The previous prime is 127921847. The next prime is 127921933. The reversal of 127921887 is 788129721.

It is not a de Polignac number, because 127921887 - 2²⁶ = 60813023 is a prime.

It is a super-3 number, since 3×127921887³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127921847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16062 + ... + 22667.

It is an arithmetic number, because the mean of its divisors is an integer number (15440360).

Almost surely, 2^127921887 is an apocalyptic number.

127921887 is a deficient number, since it is larger than the sum of its proper divisors (57362433).

127921887 is a wasteful number, since it uses less digits than its factorization.

127921887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39102 (or 39099 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 127921887 is about 11310.2558326503. The cubic root of 127921887 is about 503.8658822085.

The spelling of 127921887 in words is "one hundred twenty-seven million, nine hundred twenty-one thousand, eight hundred eighty-seven".