127993947 has 16 divisors (see below), whose sum is σ = 176867328. Its totient is φ = 82247040.

The previous prime is 127993939. The next prime is 127993949. The reversal of 127993947 is 749399721.

It is not a de Polignac number, because 127993947 - 2³ = 127993939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127993947.

It is not an unprimeable number, because it can be changed into a prime (127993949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21843 + ... + 27075.

It is an arithmetic number, because the mean of its divisors is an integer number (11054208).

Almost surely, 2^127993947 is an apocalyptic number.

127993947 is a deficient number, since it is larger than the sum of its proper divisors (48873381).

127993947 is a wasteful number, since it uses less digits than its factorization.

127993947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530.

The product of its digits is 857304, while the sum is 51.

The square root of 127993947 is about 11313.4409884880. The cubic root of 127993947 is about 503.9604757680.

The spelling of 127993947 in words is "one hundred twenty-seven million, nine hundred ninety-three thousand, nine hundred forty-seven".