3977006749 has 4 divisors (see below), whose sum is σ = 3978351936. Its totient is φ = 3975661564.

The previous prime is 3977006629. The next prime is 3977006791. The reversal of 3977006749 is 9476007793.

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 3977006749 - 2²¹ = 3974909597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3977006696 and 3977006705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977006149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668149 + ... + 674074.

It is an arithmetic number, because the mean of its divisors is an integer number (994587984).

Almost surely, 2^3977006749 is an apocalyptic number.

It is an amenable number.

3977006749 is a deficient number, since it is larger than the sum of its proper divisors (1345187).

3977006749 is a wasteful number, since it uses less digits than its factorization.

3977006749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345186.

The product of its (nonzero) digits is 2000376, while the sum is 52.

The square root of 3977006749 is about 63063.5136112792. The cubic root of 3977006749 is about 1584.3535793101.

The spelling of 3977006749 in words is "three billion, nine hundred seventy-seven million, six thousand, seven hundred forty-nine".