127791069 has 24 divisors (see below), whose sum is σ = 198764928. Its totient is φ = 72817920.

The previous prime is 127791061. The next prime is 127791089. The reversal of 127791069 is 960197721.

It is a happy number.

It is not a de Polignac number, because 127791069 - 2³ = 127791061 is a prime.

It is a super-2 number, since 2×127791069² = 32661114632325522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127791069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127791061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62349 + ... + 64365.

It is an arithmetic number, because the mean of its divisors is an integer number (8281872).

Almost surely, 2^127791069 is an apocalyptic number.

It is an amenable number.

127791069 is a deficient number, since it is larger than the sum of its proper divisors (70973859).

127791069 is a wasteful number, since it uses less digits than its factorization.

127791069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 42.

The square root of 127791069 is about 11304.4711950626. The cubic root of 127791069 is about 503.6940658751.

The spelling of 127791069 in words is "one hundred twenty-seven million, seven hundred ninety-one thousand, sixty-nine".