3989961049 has 2 divisors, whose sum is σ = 3989961050. Its totient is φ = 3989961048.

The previous prime is 3989960983. The next prime is 3989961077. The reversal of 3989961049 is 9401699893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3175886025 + 814075024 = 56355^2 + 28532^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989961049 - 2⁷ = 3989960921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3989960984 and 3989961002.

It is not a weakly prime, because it can be changed into another prime (3989961089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994980524 + 1994980525.

It is an arithmetic number, because the mean of its divisors is an integer number (1994980525).

Almost surely, 2^3989961049 is an apocalyptic number.

It is an amenable number.

3989961049 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989961049 is an equidigital number, since it uses as much as digits as its factorization.

3989961049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The square root of 3989961049 is about 63166.1384683281. The cubic root of 3989961049 is about 1586.0719526689.

The spelling of 3989961049 in words is "three billion, nine hundred eighty-nine million, nine hundred sixty-one thousand, forty-nine".