3127140749 has 4 divisors (see below), whose sum is σ = 3135392160. Its totient is φ = 3118889340.

The previous prime is 3127140739. The next prime is 3127140763. The reversal of 3127140749 is 9470417213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9470417213 = 683 ⋅13865911.

It is a cyclic number.

It is not a de Polignac number, because 3127140749 - 2⁴ = 3127140733 is a prime.

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 (3127140739) 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, 4125137 + ... + 4125894.

It is an arithmetic number, because the mean of its divisors is an integer number (783848040).

Almost surely, 2^3127140749 is an apocalyptic number.

It is an amenable number.

3127140749 is a deficient number, since it is larger than the sum of its proper divisors (8251411).

3127140749 is an equidigital number, since it uses as much as digits as its factorization.

3127140749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251410.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 3127140749 is about 55920.8436005753. The cubic root of 3127140749 is about 1462.3426375991.

The spelling of 3127140749 in words is "three billion, one hundred twenty-seven million, one hundred forty thousand, seven hundred forty-nine".