7148489 has 2 divisors, whose sum is σ = 7148490. Its totient is φ = 7148488.

The previous prime is 7148461. The next prime is 7148497. The reversal of 7148489 is 9848417.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6864400 + 284089 = 2620^2 + 533^2 .

It is an emirp because it is prime and its reverse (9848417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7148489 is a prime.

It is a super-2 number, since 2×7148489² = 102201789966242, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7148419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3574244 + 3574245.

It is an arithmetic number, because the mean of its divisors is an integer number (3574245).

Almost surely, 2^7148489 is an apocalyptic number.

It is an amenable number.

7148489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7148489 is an equidigital number, since it uses as much as digits as its factorization.

7148489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 7148489 is about 2673.6658355150. The cubic root of 7148489 is about 192.6362806265.

The spelling of 7148489 in words is "seven million, one hundred forty-eight thousand, four hundred eighty-nine".