3925770809 has 2 divisors, whose sum is σ = 3925770810. Its totient is φ = 3925770808.

The previous prime is 3925770767. The next prime is 3925770817. The reversal of 3925770809 is 9080775293.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3624401209 + 301369600 = 60203^2 + 17360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3925770809 is a prime.

It is not a weakly prime, because it can be changed into another prime (3925775809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1962885404 + 1962885405.

It is an arithmetic number, because the mean of its divisors is an integer number (1962885405).

Almost surely, 2^3925770809 is an apocalyptic number.

It is an amenable number.

3925770809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3925770809 is an equidigital number, since it uses as much as digits as its factorization.

3925770809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 3925770809 is about 62655.9718542455. The cubic root of 3925770809 is about 1577.5203867492.

The spelling of 3925770809 in words is "three billion, nine hundred twenty-five million, seven hundred seventy thousand, eight hundred nine".