26978449 has 2 divisors, whose sum is σ = 26978450. Its totient is φ = 26978448.

The previous prime is 26978437. The next prime is 26978459. The reversal of 26978449 is 94487962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14197824 + 12780625 = 3768^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 26978449 - 2⁵ = 26978417 is a prime.

It is not a weakly prime, because it can be changed into another prime (26978429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13489224 + 13489225.

It is an arithmetic number, because the mean of its divisors is an integer number (13489225).

Almost surely, 2^26978449 is an apocalyptic number.

It is an amenable number.

26978449 is a deficient number, since it is larger than the sum of its proper divisors (1).

26978449 is an equidigital number, since it uses as much as digits as its factorization.

26978449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 26978449 is about 5194.0782627912. The cubic root of 26978449 is about 299.9201602354.

The spelling of 26978449 in words is "twenty-six million, nine hundred seventy-eight thousand, four hundred forty-nine".