12637489 has 4 divisors (see below), whose sum is σ = 13302640. Its totient is φ = 11972340.

The previous prime is 12637483. The next prime is 12637507. The reversal of 12637489 is 98473621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98473621 = 6521 ⋅15101.

It is a cyclic number.

It is not a de Polignac number, because 12637489 - 2³ = 12637481 is a prime.

It is a super-2 number, since 2×12637489² = 319412256450242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12637481) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332547 + ... + 332584.

It is an arithmetic number, because the mean of its divisors is an integer number (3325660).

Almost surely, 2^12637489 is an apocalyptic number.

12637489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12637489 is a deficient number, since it is larger than the sum of its proper divisors (665151).

12637489 is an equidigital number, since it uses as much as digits as its factorization.

12637489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665150.

The product of its digits is 72576, while the sum is 40.

The square root of 12637489 is about 3554.9246124215. The cubic root of 12637489 is about 232.9272308014.

The spelling of 12637489 in words is "twelve million, six hundred thirty-seven thousand, four hundred eighty-nine".