5127763721 has 4 divisors (see below), whose sum is σ = 5128626192. Its totient is φ = 5126901252.

The previous prime is 5127763709. The next prime is 5127763759. The reversal of 5127763721 is 1273677215.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1273677215 = 5 ⋅254735443.

It is a cyclic number.

It is not a de Polignac number, because 5127763721 - 2⁶ = 5127763657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5127763321) 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, 422255 + ... + 434228.

It is an arithmetic number, because the mean of its divisors is an integer number (1282156548).

Almost surely, 2^5127763721 is an apocalyptic number.

It is an amenable number.

5127763721 is a deficient number, since it is larger than the sum of its proper divisors (862471).

5127763721 is an equidigital number, since it uses as much as digits as its factorization.

5127763721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862470.

The product of its digits is 123480, while the sum is 41.

The square root of 5127763721 is about 71608.4053795363. The cubic root of 5127763721 is about 1724.4184802847.

The spelling of 5127763721 in words is "five billion, one hundred twenty-seven million, seven hundred sixty-three thousand, seven hundred twenty-one".