11897489 has 2 divisors, whose sum is σ = 11897490. Its totient is φ = 11897488.

The previous prime is 11897471. The next prime is 11897507. The reversal of 11897489 is 98479811.

It is a balanced prime because it is at equal distance from previous prime (11897471) and next prime (11897507).

It can be written as a sum of positive squares in only one way, i.e., 8456464 + 3441025 = 2908^2 + 1855^2 .

It is an emirp because it is prime and its reverse (98479811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11897489 - 2²⁰ = 10848913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11897419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5948744 + 5948745.

It is an arithmetic number, because the mean of its divisors is an integer number (5948745).

Almost surely, 2^11897489 is an apocalyptic number.

It is an amenable number.

11897489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11897489 is an equidigital number, since it uses as much as digits as its factorization.

11897489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 47.

The square root of 11897489 is about 3449.2736916632. The cubic root of 11897489 is about 228.2890621659.

The spelling of 11897489 in words is "eleven million, eight hundred ninety-seven thousand, four hundred eighty-nine".