127887665 has 8 divisors (see below), whose sum is σ = 153527400. Its totient is φ = 102268672.

The previous prime is 127887653. The next prime is 127887667. The reversal of 127887665 is 566788721.

It can be written as a sum of positive squares in 4 ways, for example, as 5387041 + 122500624 = 2321^2 + 11068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127887665 - 2¹⁰ = 127886641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127887667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17087 + ... + 23403.

It is an arithmetic number, because the mean of its divisors is an integer number (19190925).

Almost surely, 2^127887665 is an apocalyptic number.

It is an amenable number.

127887665 is a deficient number, since it is larger than the sum of its proper divisors (25639735).

127887665 is an equidigital number, since it uses as much as digits as its factorization.

127887665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10371.

The product of its digits is 1128960, while the sum is 50.

The square root of 127887665 is about 11308.7428567458. The cubic root of 127887665 is about 503.8209463586.

The spelling of 127887665 in words is "one hundred twenty-seven million, eight hundred eighty-seven thousand, six hundred sixty-five".