127992657 has 24 divisors (see below), whose sum is σ = 189816384. Its totient is φ = 76624704.

The previous prime is 127992647. The next prime is 127992679. The reversal of 127992657 is 756299721.

It is not a de Polignac number, because 127992657 - 2⁶ = 127992593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127992617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15348 + ... + 22170.

It is an arithmetic number, because the mean of its divisors is an integer number (7909016).

Almost surely, 2^127992657 is an apocalyptic number.

It is an amenable number.

127992657 is a deficient number, since it is larger than the sum of its proper divisors (61823727).

127992657 is a wasteful number, since it uses less digits than its factorization.

127992657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889 (or 6876 counting only the distinct ones).

The product of its digits is 476280, while the sum is 48.

The square root of 127992657 is about 11313.3839765121. The cubic root of 127992657 is about 503.9587826900.

The spelling of 127992657 in words is "one hundred twenty-seven million, nine hundred ninety-two thousand, six hundred fifty-seven".