7774993489 has 2 divisors, whose sum is σ = 7774993490. Its totient is φ = 7774993488.

The previous prime is 7774993463. The next prime is 7774993517. The reversal of 7774993489 is 9843994777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7736961600 + 38031889 = 87960^2 + 6167^2 .

It is an emirp because it is prime and its reverse (9843994777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7774993489 - 2⁹ = 7774992977 is a prime.

It is not a weakly prime, because it can be changed into another prime (7774903489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3887496744 + 3887496745.

It is an arithmetic number, because the mean of its divisors is an integer number (3887496745).

Almost surely, 2^7774993489 is an apocalyptic number.

It is an amenable number.

7774993489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7774993489 is an equidigital number, since it uses as much as digits as its factorization.

7774993489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96018048, while the sum is 67.

The square root of 7774993489 is about 88175.9235222405. The cubic root of 7774993489 is about 1981.0708665821.

The spelling of 7774993489 in words is "seven billion, seven hundred seventy-four million, nine hundred ninety-three thousand, four hundred eighty-nine".