3948643737 has 48 divisors (see below), whose sum is σ = 6227778960. Its totient is φ = 2400731136.

The previous prime is 3948643733. The next prime is 3948643747. The reversal of 3948643737 is 7373468493.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 106007616 + 3842636121 = 10296^2 + 61989^2 .

It is not a de Polignac number, because 3948643737 - 2² = 3948643733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3948643733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1521513 + ... + 1524105.

It is an arithmetic number, because the mean of its divisors is an integer number (129745395).

Almost surely, 2^3948643737 is an apocalyptic number.

3948643737 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

3948643737 is a deficient number, since it is larger than the sum of its proper divisors (2279135223).

3948643737 is a wasteful number, since it uses less digits than its factorization.

3948643737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922 (or 2919 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The square root of 3948643737 is about 62838.2346744401. The cubic root of 3948643737 is about 1580.5781862186.

The spelling of 3948643737 in words is "three billion, nine hundred forty-eight million, six hundred forty-three thousand, seven hundred thirty-seven".