26478559 has 2 divisors, whose sum is σ = 26478560. Its totient is φ = 26478558.

The previous prime is 26478547. The next prime is 26478563. The reversal of 26478559 is 95587462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26478559 - 2¹⁷ = 26347487 is a prime.

It is a super-2 number, since 2×26478559² = 1402228173432962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26478259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13239279 + 13239280.

It is an arithmetic number, because the mean of its divisors is an integer number (13239280).

Almost surely, 2^26478559 is an apocalyptic number.

26478559 is a deficient number, since it is larger than the sum of its proper divisors (1).

26478559 is an equidigital number, since it uses as much as digits as its factorization.

26478559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 46.

The square root of 26478559 is about 5145.7321150639. The cubic root of 26478559 is about 298.0561693139.

The spelling of 26478559 in words is "twenty-six million, four hundred seventy-eight thousand, five hundred fifty-nine".