26199949 has 2 divisors, whose sum is σ = 26199950. Its totient is φ = 26199948.

The previous prime is 26199947. The next prime is 26199977. The reversal of 26199949 is 94999162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 1249924 = 4995^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 26199949 - 2¹ = 26199947 is a prime.

Together with 26199947, 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 (26199947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13099974 + 13099975.

It is an arithmetic number, because the mean of its divisors is an integer number (13099975).

Almost surely, 2^26199949 is an apocalyptic number.

It is an amenable number.

26199949 is a deficient number, since it is larger than the sum of its proper divisors (1).

26199949 is an equidigital number, since it uses as much as digits as its factorization.

26199949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 49.

The square root of 26199949 is about 5118.5885749882. The cubic root of 26199949 is about 297.0070890545.

The spelling of 26199949 in words is "twenty-six million, one hundred ninety-nine thousand, nine hundred forty-nine".