26977021 has 2 divisors, whose sum is σ = 26977022. Its totient is φ = 26977020.

The previous prime is 26977019. The next prime is 26977043. The reversal of 26977021 is 12077962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18156121 + 8820900 = 4261^2 + 2970^2 .

It is a cyclic number.

It is not a de Polignac number, because 26977021 - 2¹ = 26977019 is a prime.

Together with 26977019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26977051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13488510 + 13488511.

It is an arithmetic number, because the mean of its divisors is an integer number (13488511).

Almost surely, 2^26977021 is an apocalyptic number.

It is an amenable number.

26977021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26977021 is an equidigital number, since it uses as much as digits as its factorization.

26977021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 26977021 is about 5193.9407967361. The cubic root of 26977021 is about 299.9148684369.

The spelling of 26977021 in words is "twenty-six million, nine hundred seventy-seven thousand, twenty-one".