12749489 has 2 divisors, whose sum is σ = 12749490. Its totient is φ = 12749488.

The previous prime is 12749453. The next prime is 12749501. The reversal of 12749489 is 98494721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8880400 + 3869089 = 2980^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 12749489 - 2¹⁶ = 12683953 is a prime.

It is a super-2 number, since 2×12749489² = 325098939522242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12749449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374744 + 6374745.

It is an arithmetic number, because the mean of its divisors is an integer number (6374745).

Almost surely, 2^12749489 is an apocalyptic number.

It is an amenable number.

12749489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12749489 is an equidigital number, since it uses as much as digits as its factorization.

12749489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 12749489 is about 3570.6426592422. The cubic root of 12749489 is about 233.6133153826.

The spelling of 12749489 in words is "twelve million, seven hundred forty-nine thousand, four hundred eighty-nine".