26659949 has 2 divisors, whose sum is σ = 26659950. Its totient is φ = 26659948.

The previous prime is 26659931. The next prime is 26659973. The reversal of 26659949 is 94995662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24157225 + 2502724 = 4915^2 + 1582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26659949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26659897 and 26659906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26659909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13329974 + 13329975.

It is an arithmetic number, because the mean of its divisors is an integer number (13329975).

Almost surely, 2^26659949 is an apocalyptic number.

It is an amenable number.

26659949 is a deficient number, since it is larger than the sum of its proper divisors (1).

26659949 is an equidigital number, since it uses as much as digits as its factorization.

26659949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 26659949 is about 5163.3273186967. The cubic root of 26659949 is about 298.7352271775.

The spelling of 26659949 in words is "twenty-six million, six hundred fifty-nine thousand, nine hundred forty-nine".