127869681 has 4 divisors (see below), whose sum is σ = 170492912. Its totient is φ = 85246452.

The previous prime is 127869653. The next prime is 127869683. The reversal of 127869681 is 186968721.

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.

It is not a de Polignac number, because 127869681 - 2¹¹ = 127867633 is a prime.

It is a super-2 number, since 2×127869681² = 32701310638083522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127869681.

It is not an unprimeable number, because it can be changed into a prime (127869683) 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, 21311611 + ... + 21311616.

It is an arithmetic number, because the mean of its divisors is an integer number (42623228).

Almost surely, 2^127869681 is an apocalyptic number.

It is an amenable number.

127869681 is a deficient number, since it is larger than the sum of its proper divisors (42623231).

127869681 is an equidigital number, since it uses as much as digits as its factorization.

127869681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42623230.

The product of its digits is 290304, while the sum is 48.

The square root of 127869681 is about 11307.9476917786. The cubic root of 127869681 is about 503.7973289111.

The spelling of 127869681 in words is "one hundred twenty-seven million, eight hundred sixty-nine thousand, six hundred eighty-one".