3998467309 has 2 divisors, whose sum is σ = 3998467310. Its totient is φ = 3998467308.

The previous prime is 3998467283. The next prime is 3998467387. The reversal of 3998467309 is 9037648993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2580944809 + 1417522500 = 50803^2 + 37650^2 .

It is an emirp because it is prime and its reverse (9037648993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3998467309 - 2¹⁹ = 3997943021 is a prime.

It is a super-2 number, since 2×3998467309² = 31975481642283402962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998467009) 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, 1999233654 + 1999233655.

It is an arithmetic number, because the mean of its divisors is an integer number (1999233655).

Almost surely, 2^3998467309 is an apocalyptic number.

It is an amenable number.

3998467309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998467309 is an equidigital number, since it uses as much as digits as its factorization.

3998467309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The square root of 3998467309 is about 63233.4350561473. The cubic root of 3998467309 is about 1587.1982764578.

The spelling of 3998467309 in words is "three billion, nine hundred ninety-eight million, four hundred sixty-seven thousand, three hundred nine".