7489693121 has 2 divisors, whose sum is σ = 7489693122. Its totient is φ = 7489693120.

The previous prime is 7489693117. The next prime is 7489693171. The reversal of 7489693121 is 1213969847.

It is an a-pointer prime, because the next prime (7489693171) can be obtained adding 7489693121 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3837183025 + 3652510096 = 61945^2 + 60436^2 .

It is a cyclic number.

It is not a de Polignac number, because 7489693121 - 2² = 7489693117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7489693121.

It is not a weakly prime, because it can be changed into another prime (7489693171) 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, 3744846560 + 3744846561.

It is an arithmetic number, because the mean of its divisors is an integer number (3744846561).

Almost surely, 2^7489693121 is an apocalyptic number.

It is an amenable number.

7489693121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7489693121 is an equidigital number, since it uses as much as digits as its factorization.

7489693121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 7489693121 is about 86543.0131264217. The cubic root of 7489693121 is about 1956.5367413643.

The spelling of 7489693121 in words is "seven billion, four hundred eighty-nine million, six hundred ninety-three thousand, one hundred twenty-one".