26691047 has 2 divisors, whose sum is σ = 26691048. Its totient is φ = 26691046.

The previous prime is 26691013. The next prime is 26691059. The reversal of 26691047 is 74019662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26691047 - 2⁸ = 26690791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26690998 and 26691016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26691947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13345523 + 13345524.

It is an arithmetic number, because the mean of its divisors is an integer number (13345524).

Almost surely, 2^26691047 is an apocalyptic number.

26691047 is a deficient number, since it is larger than the sum of its proper divisors (1).

26691047 is an equidigital number, since it uses as much as digits as its factorization.

26691047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 26691047 is about 5166.3378712585. The cubic root of 26691047 is about 298.8513371551.

The spelling of 26691047 in words is "twenty-six million, six hundred ninety-one thousand, forty-seven".