127921493 has 16 divisors (see below), whose sum is σ = 147897984. Its totient is φ = 108380160.

The previous prime is 127921487. The next prime is 127921513. The reversal of 127921493 is 394129721.

It is not a de Polignac number, because 127921493 - 2⁶ = 127921429 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127921793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379421 + ... + 379757.

It is an arithmetic number, because the mean of its divisors is an integer number (9243624).

Almost surely, 2^127921493 is an apocalyptic number.

It is an amenable number.

127921493 is a deficient number, since it is larger than the sum of its proper divisors (19976491).

127921493 is a wasteful number, since it uses less digits than its factorization.

127921493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its digits is 27216, while the sum is 38.

The square root of 127921493 is about 11310.2384148169. The cubic root of 127921493 is about 503.8653649048.

The spelling of 127921493 in words is "one hundred twenty-seven million, nine hundred twenty-one thousand, four hundred ninety-three".