26949157 has 2 divisors, whose sum is σ = 26949158. Its totient is φ = 26949156.

The previous prime is 26949151. The next prime is 26949173. The reversal of 26949157 is 75194962.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21538881 + 5410276 = 4641^2 + 2326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26949157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26949151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13474578 + 13474579.

It is an arithmetic number, because the mean of its divisors is an integer number (13474579).

Almost surely, 2^26949157 is an apocalyptic number.

It is an amenable number.

26949157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26949157 is an equidigital number, since it uses as much as digits as its factorization.

26949157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 26949157 is about 5191.2577474057. The cubic root of 26949157 is about 299.8115742699.

The spelling of 26949157 in words is "twenty-six million, nine hundred forty-nine thousand, one hundred fifty-seven".