127286993 has 4 divisors (see below), whose sum is σ = 130727220. Its totient is φ = 123846768.

The previous prime is 127286987. The next prime is 127287011. The reversal of 127286993 is 399682721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120275089 + 7011904 = 10967^2 + 2648^2 .

It is a cyclic number.

It is not a de Polignac number, because 127286993 - 2⁸ = 127286737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (127286953) 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, 1720058 + ... + 1720131.

It is an arithmetic number, because the mean of its divisors is an integer number (32681805).

Almost surely, 2^127286993 is an apocalyptic number.

It is an amenable number.

127286993 is a deficient number, since it is larger than the sum of its proper divisors (3440227).

127286993 is an equidigital number, since it uses as much as digits as its factorization.

127286993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440226.

The product of its digits is 326592, while the sum is 47.

The square root of 127286993 is about 11282.1537394240. The cubic root of 127286993 is about 503.0309139963.

The spelling of 127286993 in words is "one hundred twenty-seven million, two hundred eighty-six thousand, nine hundred ninety-three".