3939163749 has 12 divisors (see below), whose sum is σ = 5699378412. Its totient is φ = 2621736000.

The previous prime is 3939163741. The next prime is 3939163777. The reversal of 3939163749 is 9473619393.

It can be written as a sum of positive squares in 2 ways, for example, as 2481833124 + 1457330625 = 49818^2 + 38175^2 .

It is not a de Polignac number, because 3939163749 - 2³ = 3939163741 is a prime.

It is a super-2 number, since 2×3939163749² = 31034022082871470002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3939163695 and 3939163704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939163741) 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 11 ways as a sum of consecutive naturals, for example, 358722 + ... + 369539.

It is an arithmetic number, because the mean of its divisors is an integer number (474948201).

Almost surely, 2^3939163749 is an apocalyptic number.

It is an amenable number.

3939163749 is a deficient number, since it is larger than the sum of its proper divisors (1760214663).

3939163749 is a wasteful number, since it uses less digits than its factorization.

3939163749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728868 (or 728865 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 54.

The square root of 3939163749 is about 62762.7576592998. The cubic root of 3939163749 is about 1579.3122773438.

The spelling of 3939163749 in words is "three billion, nine hundred thirty-nine million, one hundred sixty-three thousand, seven hundred forty-nine".