127787957 has 4 divisors (see below), whose sum is σ = 139405056. Its totient is φ = 116170860.

The previous prime is 127787917. The next prime is 127787981. The reversal of 127787957 is 759787721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127787957 - 2⁶ = 127787893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127787899 and 127787908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127787917) 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, 5808533 + ... + 5808554.

It is an arithmetic number, because the mean of its divisors is an integer number (34851264).

Almost surely, 2^127787957 is an apocalyptic number.

It is an amenable number.

127787957 is a deficient number, since it is larger than the sum of its proper divisors (11617099).

127787957 is a wasteful number, since it uses less digits than its factorization.

127787957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11617098.

The product of its digits is 1728720, while the sum is 53.

The square root of 127787957 is about 11304.3335495729. Note that the first 3 decimals coincide. The cubic root of 127787957 is about 503.6899771473.

The spelling of 127787957 in words is "one hundred twenty-seven million, seven hundred eighty-seven thousand, nine hundred fifty-seven".