127387993 has 6 divisors (see below), whose sum is σ = 129230862. Its totient is φ = 125547840.

The previous prime is 127387963. The next prime is 127388011. The reversal of 127387993 is 399783721.

It can be written as a sum of positive squares in 3 ways, for example, as 82591744 + 44796249 = 9088^2 + 6693^2 .

It is not a de Polignac number, because 127387993 - 2²⁵ = 93833561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127387933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95773 + ... + 97093.

It is an arithmetic number, because the mean of its divisors is an integer number (21538477).

Almost surely, 2^127387993 is an apocalyptic number.

It is an amenable number.

127387993 is a deficient number, since it is larger than the sum of its proper divisors (1842869).

127387993 is an frugal number, since it uses more digits than its factorization.

127387993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 1394 counting only the distinct ones).

The product of its digits is 571536, while the sum is 49.

The square root of 127387993 is about 11286.6289475645. The cubic root of 127387993 is about 503.1639275617.

The spelling of 127387993 in words is "one hundred twenty-seven million, three hundred eighty-seven thousand, nine hundred ninety-three".