3948782909 has 2 divisors, whose sum is σ = 3948782910. Its totient is φ = 3948782908.

The previous prime is 3948782897. The next prime is 3948782963. The reversal of 3948782909 is 9092878493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3850574809 + 98208100 = 62053^2 + 9910^2 .

It is a cyclic number.

It is not a de Polignac number, because 3948782909 - 2²⁰ = 3947734333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3948782009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974391454 + 1974391455.

It is an arithmetic number, because the mean of its divisors is an integer number (1974391455).

Almost surely, 2^3948782909 is an apocalyptic number.

It is an amenable number.

3948782909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3948782909 is an equidigital number, since it uses as much as digits as its factorization.

3948782909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The square root of 3948782909 is about 62839.3420477968. The cubic root of 3948782909 is about 1580.5967554335.

The spelling of 3948782909 in words is "three billion, nine hundred forty-eight million, seven hundred eighty-two thousand, nine hundred nine".