127994364169 has 9 divisors (see below), whose sum is σ = 148894316487. Its totient is φ = 109707308424.

The previous prime is 127994364149. The next prime is 127994364181. The reversal of 127994364169 is 961463499721.

The square root of 127994364169 is 357763.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 123191874169 + 4802490000 = 350987^2 + 69300^2 .

It is not a de Polignac number, because 127994364169 - 2⁹ = 127994363657 is a prime.

It is a super-2 number, since 2×127994364169² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127994364109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2478787 + ... + 2529895.

It is an arithmetic number, because the mean of its divisors is an integer number (16543812943).

Almost surely, 2^127994364169 is an apocalyptic number.

127994364169 is the 357763-rd square number.

127994364169 is the 178882-nd centered octagonal number.

It is an amenable number.

127994364169 is a deficient number, since it is larger than the sum of its proper divisors (20899952318).

127994364169 is an frugal number, since it uses more digits than its factorization.

127994364169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102232 (or 51116 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 61.

The spelling of 127994364169 in words is "one hundred twenty-seven billion, nine hundred ninety-four million, three hundred sixty-four thousand, one hundred sixty-nine".