7489690121 has 2 divisors, whose sum is σ = 7489690122. Its totient is φ = 7489690120.

The previous prime is 7489690093. The next prime is 7489690141. The reversal of 7489690121 is 1210969847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4534136896 + 2955553225 = 67336^2 + 54365^2 .

It is a cyclic number.

It is not a de Polignac number, because 7489690121 - 2⁶ = 7489690057 is a prime.

It is not a weakly prime, because it can be changed into another prime (7489690141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3744845060 + 3744845061.

It is an arithmetic number, because the mean of its divisors is an integer number (3744845061).

Almost surely, 2^7489690121 is an apocalyptic number.

It is an amenable number.

7489690121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7489690121 is an equidigital number, since it uses as much as digits as its factorization.

7489690121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 7489690121 is about 86542.9957939983. The cubic root of 7489690121 is about 1956.5364801338.

The spelling of 7489690121 in words is "seven billion, four hundred eighty-nine million, six hundred ninety thousand, one hundred twenty-one".