127931693 has 4 divisors (see below), whose sum is σ = 134664960. Its totient is φ = 121198428.

The previous prime is 127931677. The next prime is 127931747. The reversal of 127931693 is 396139721.

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 127931693 - 2⁴ = 127931677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127931693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127931623) 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, 3366605 + ... + 3366642.

It is an arithmetic number, because the mean of its divisors is an integer number (33666240).

Almost surely, 2^127931693 is an apocalyptic number.

It is an amenable number.

127931693 is a deficient number, since it is larger than the sum of its proper divisors (6733267).

127931693 is an equidigital number, since it uses as much as digits as its factorization.

127931693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733266.

The product of its digits is 61236, while the sum is 41.

The square root of 127931693 is about 11310.6893247052. The cubic root of 127931693 is about 503.8787566865.

The spelling of 127931693 in words is "one hundred twenty-seven million, nine hundred thirty-one thousand, six hundred ninety-three".