127771213 has 4 divisors (see below), whose sum is σ = 129088540. Its totient is φ = 126453888.

The previous prime is 127771207. The next prime is 127771223. The reversal of 127771213 is 312177721.

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 65076489 + 62694724 = 8067^2 + 7918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127771213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127771223) 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, 658518 + ... + 658711.

It is an arithmetic number, because the mean of its divisors is an integer number (32272135).

Almost surely, 2^127771213 is an apocalyptic number.

It is an amenable number.

127771213 is a deficient number, since it is larger than the sum of its proper divisors (1317327).

127771213 is an equidigital number, since it uses as much as digits as its factorization.

127771213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317326.

The product of its digits is 4116, while the sum is 31.

The square root of 127771213 is about 11303.5929243759. The cubic root of 127771213 is about 503.6679767608.

The spelling of 127771213 in words is "one hundred twenty-seven million, seven hundred seventy-one thousand, two hundred thirteen".