26691449 has 4 divisors (see below), whose sum is σ = 26702964. Its totient is φ = 26679936.

The previous prime is 26691407. The next prime is 26691461. The reversal of 26691449 is 94419662.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94419662 = 2 ⋅47209831.

It can be written as a sum of positive squares in 2 ways, for example, as 25603600 + 1087849 = 5060^2 + 1043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26691449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26691499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932 + ... + 7365.

It is an arithmetic number, because the mean of its divisors is an integer number (6675741).

Almost surely, 2^26691449 is an apocalyptic number.

It is an amenable number.

26691449 is a deficient number, since it is larger than the sum of its proper divisors (11515).

26691449 is an equidigital number, since it uses as much as digits as its factorization.

26691449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11514.

The product of its digits is 93312, while the sum is 41.

The square root of 26691449 is about 5166.3767768137. The cubic root of 26691449 is about 298.8528375038.

The spelling of 26691449 in words is "twenty-six million, six hundred ninety-one thousand, four hundred forty-nine".