127687313 has 4 divisors (see below), whose sum is σ = 137509428. Its totient is φ = 117865200.

The previous prime is 127687309. The next prime is 127687379. The reversal of 127687313 is 313786721.

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 51509329 + 76177984 = 7177^2 + 8728^2 .

It is a cyclic number.

It is not a de Polignac number, because 127687313 - 2² = 127687309 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 (127687393) 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, 4911038 + ... + 4911063.

It is an arithmetic number, because the mean of its divisors is an integer number (34377357).

Almost surely, 2^127687313 is an apocalyptic number.

127687313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

127687313 is a deficient number, since it is larger than the sum of its proper divisors (9822115).

127687313 is an equidigital number, since it uses as much as digits as its factorization.

127687313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9822114.

The product of its digits is 42336, while the sum is 38.

The square root of 127687313 is about 11299.8811055692. The cubic root of 127687313 is about 503.5577093668.

The spelling of 127687313 in words is "one hundred twenty-seven million, six hundred eighty-seven thousand, three hundred thirteen".