5127687381 has 4 divisors (see below), whose sum is σ = 6836916512. Its totient is φ = 3418458252.

The previous prime is 5127687347. The next prime is 5127687469. The reversal of 5127687381 is 1837867215.

It is a happy number.

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 not a de Polignac number, because 5127687381 - 2⁶ = 5127687317 is a prime.

It is a super-2 number, since 2×5127687381² = 52586355754533278322, which contains 22 as substring.

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 5127687381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5127683381) 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, 854614561 + ... + 854614566.

It is an arithmetic number, because the mean of its divisors is an integer number (1709229128).

Almost surely, 2^5127687381 is an apocalyptic number.

It is an amenable number.

5127687381 is a deficient number, since it is larger than the sum of its proper divisors (1709229131).

5127687381 is a wasteful number, since it uses less digits than its factorization.

5127687381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709229130.

The product of its digits is 564480, while the sum is 48.

The square root of 5127687381 is about 71607.8723395689. The cubic root of 5127687381 is about 1724.4099227688.

The spelling of 5127687381 in words is "five billion, one hundred twenty-seven million, six hundred eighty-seven thousand, three hundred eighty-one".