26721047 has 2 divisors, whose sum is σ = 26721048. Its totient is φ = 26721046.

The previous prime is 26721031. The next prime is 26721073. The reversal of 26721047 is 74012762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26721047 - 2⁴ = 26721031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26721547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360523 + 13360524.

It is an arithmetic number, because the mean of its divisors is an integer number (13360524).

Almost surely, 2^26721047 is an apocalyptic number.

26721047 is a deficient number, since it is larger than the sum of its proper divisors (1).

26721047 is an equidigital number, since it uses as much as digits as its factorization.

26721047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 26721047 is about 5169.2404664515. The cubic root of 26721047 is about 298.9632621164.

The spelling of 26721047 in words is "twenty-six million, seven hundred twenty-one thousand, forty-seven".