26687489 has 2 divisors, whose sum is σ = 26687490. Its totient is φ = 26687488.

The previous prime is 26687447. The next prime is 26687579. The reversal of 26687489 is 98478662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24671089 + 2016400 = 4967^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 26687489 - 2²⁰ = 25638913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26687389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13343744 + 13343745.

It is an arithmetic number, because the mean of its divisors is an integer number (13343745).

Almost surely, 2^26687489 is an apocalyptic number.

It is an amenable number.

26687489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26687489 is an equidigital number, since it uses as much as digits as its factorization.

26687489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 26687489 is about 5165.9935152882. The cubic root of 26687489 is about 298.8380572925.

The spelling of 26687489 in words is "twenty-six million, six hundred eighty-seven thousand, four hundred eighty-nine".