127880813 has 2 divisors, whose sum is σ = 127880814. Its totient is φ = 127880812.

The previous prime is 127880791. The next prime is 127880821. The reversal of 127880813 is 318088721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69923044 + 57957769 = 8362^2 + 7613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127880813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127880833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63940406 + 63940407.

It is an arithmetic number, because the mean of its divisors is an integer number (63940407).

Almost surely, 2^127880813 is an apocalyptic number.

It is an amenable number.

127880813 is a deficient number, since it is larger than the sum of its proper divisors (1).

127880813 is an equidigital number, since it uses as much as digits as its factorization.

127880813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 127880813 is about 11308.4399012419. The cubic root of 127880813 is about 503.8119482462.

The spelling of 127880813 in words is "one hundred twenty-seven million, eight hundred eighty thousand, eight hundred thirteen".