12658949 has 2 divisors, whose sum is σ = 12658950. Its totient is φ = 12658948.

The previous prime is 12658879. The next prime is 12658951. The reversal of 12658949 is 94985621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 1221025 = 3382^2 + 1105^2 .

It is an emirp because it is prime and its reverse (94985621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12658949 is a prime.

Together with 12658951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12658649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6329474 + 6329475.

It is an arithmetic number, because the mean of its divisors is an integer number (6329475).

Almost surely, 2^12658949 is an apocalyptic number.

It is an amenable number.

12658949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12658949 is an equidigital number, since it uses as much as digits as its factorization.

12658949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 12658949 is about 3557.9416802415. The cubic root of 12658949 is about 233.0590025381.

The spelling of 12658949 in words is "twelve million, six hundred fifty-eight thousand, nine hundred forty-nine".