3999747277 has 4 divisors (see below), whose sum is σ = 4004830336. Its totient is φ = 3994664220.

The previous prime is 3999747253. The next prime is 3999747289. The reversal of 3999747277 is 7727479993.

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: 7727479993 = 23 ⋅335977391.

It is a cyclic number.

It is not a de Polignac number, because 3999747277 - 2³¹ = 1852263629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999747217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540349 + ... + 2541922.

It is an arithmetic number, because the mean of its divisors is an integer number (1001207584).

Almost surely, 2^3999747277 is an apocalyptic number.

It is an amenable number.

3999747277 is a deficient number, since it is larger than the sum of its proper divisors (5083059).

3999747277 is an equidigital number, since it uses as much as digits as its factorization.

3999747277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083058.

The product of its digits is 42007896, while the sum is 64.

The square root of 3999747277 is about 63243.5552210658. Note that the first 3 decimals coincide. The cubic root of 3999747277 is about 1587.3676202011.

The spelling of 3999747277 in words is "three billion, nine hundred ninety-nine million, seven hundred forty-seven thousand, two hundred seventy-seven".