11628509 has 2 divisors, whose sum is σ = 11628510. Its totient is φ = 11628508.

The previous prime is 11628499. The next prime is 11628517. The reversal of 11628509 is 90582611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6744409 + 4884100 = 2597^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 11628509 - 2¹⁶ = 11562973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11628569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5814254 + 5814255.

It is an arithmetic number, because the mean of its divisors is an integer number (5814255).

Almost surely, 2^11628509 is an apocalyptic number.

It is an amenable number.

11628509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11628509 is an equidigital number, since it uses as much as digits as its factorization.

11628509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 11628509 is about 3410.0599701472. The cubic root of 11628509 is about 226.5555354403. Note that the first 4 decimals are identical.

The spelling of 11628509 in words is "eleven million, six hundred twenty-eight thousand, five hundred nine".