127649797 has 6 divisors (see below), whose sum is σ = 140309414. Its totient is φ = 116045160.

The previous prime is 127649789. The next prime is 127649801. The reversal of 127649797 is 797946721.

It can be written as a sum of positive squares in only one way, i.e., 112911876 + 14737921 = 10626^2 + 3839^2 .

It is not a de Polignac number, because 127649797 - 2³ = 127649789 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 (127649737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 527358 + ... + 527599.

Almost surely, 2^127649797 is an apocalyptic number.

It is an amenable number.

127649797 is a deficient number, since it is larger than the sum of its proper divisors (12659617).

127649797 is a wasteful number, since it uses less digits than its factorization.

127649797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054979 (or 1054968 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 52.

The square root of 127649797 is about 11298.2209661521. The cubic root of 127649797 is about 503.5083875220.

The spelling of 127649797 in words is "one hundred twenty-seven million, six hundred forty-nine thousand, seven hundred ninety-seven".