7869484398989 has 2 divisors, whose sum is σ = 7869484398990. Its totient is φ = 7869484398988.

The previous prime is 7869484398973. The next prime is 7869484399033. The reversal of 7869484398989 is 9898934849687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6480374652964 + 1389109746025 = 2545658^2 + 1178605^2 .

It is a cyclic number.

It is not a de Polignac number, because 7869484398989 - 2⁴ = 7869484398973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7869484398898 and 7869484398907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7869484398089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934742199494 + 3934742199495.

It is an arithmetic number, because the mean of its divisors is an integer number (3934742199495).

Almost surely, 2^{7869484398989} is an apocalyptic number.

It is an amenable number.

7869484398989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7869484398989 is an equidigital number, since it uses as much as digits as its factorization.

7869484398989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54177693696, while the sum is 92.

The spelling of 7869484398989 in words is "seven trillion, eight hundred sixty-nine billion, four hundred eighty-four million, three hundred ninety-eight thousand, nine hundred eighty-nine".