26388779 has 2 divisors, whose sum is σ = 26388780. Its totient is φ = 26388778.

The previous prime is 26388763. The next prime is 26388787. The reversal of 26388779 is 97788362.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26388779 - 2⁴ = 26388763 is a prime.

It is a super-2 number, since 2×26388779² = 1392735314221682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26388079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13194389 + 13194390.

It is an arithmetic number, because the mean of its divisors is an integer number (13194390).

Almost surely, 2^26388779 is an apocalyptic number.

26388779 is a deficient number, since it is larger than the sum of its proper divisors (1).

26388779 is an equidigital number, since it uses as much as digits as its factorization.

26388779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 26388779 is about 5137.0009733306. Note that the first 3 decimals coincide. The cubic root of 26388779 is about 297.7189180288.

The spelling of 26388779 in words is "twenty-six million, three hundred eighty-eight thousand, seven hundred seventy-nine".