3998249977 has 2 divisors, whose sum is σ = 3998249978. Its totient is φ = 3998249976.

The previous prime is 3998249947. The next prime is 3998250019. The reversal of 3998249977 is 7799428993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3274586176 + 723663801 = 57224^2 + 26901^2 .

It is an emirp because it is prime and its reverse (7799428993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3998249977 is a prime.

It is not a weakly prime, because it can be changed into another prime (3998249917) 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 as a sum of consecutive naturals, namely, 1999124988 + 1999124989.

It is an arithmetic number, because the mean of its divisors is an integer number (1999124989).

Almost surely, 2^3998249977 is an apocalyptic number.

It is an amenable number.

3998249977 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998249977 is an equidigital number, since it uses as much as digits as its factorization.

3998249977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61725888, while the sum is 67.

The square root of 3998249977 is about 63231.7165432032. The cubic root of 3998249977 is about 1587.1695191700.

The spelling of 3998249977 in words is "three billion, nine hundred ninety-eight million, two hundred forty-nine thousand, nine hundred seventy-seven".