26506939 has 2 divisors, whose sum is σ = 26506940. Its totient is φ = 26506938.

The previous prime is 26506903. The next prime is 26506969. The reversal of 26506939 is 93960562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26506939 is a prime.

It is not a weakly prime, because it can be changed into another prime (26506969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13253469 + 13253470.

It is an arithmetic number, because the mean of its divisors is an integer number (13253470).

Almost surely, 2^26506939 is an apocalyptic number.

26506939 is a deficient number, since it is larger than the sum of its proper divisors (1).

26506939 is an equidigital number, since it uses as much as digits as its factorization.

26506939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 26506939 is about 5148.4890016392. The cubic root of 26506939 is about 298.1626178785.

The spelling of 26506939 in words is "twenty-six million, five hundred six thousand, nine hundred thirty-nine".