26713721 has 2 divisors, whose sum is σ = 26713722. Its totient is φ = 26713720.

The previous prime is 26713717. The next prime is 26713759. The reversal of 26713721 is 12731762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21492496 + 5221225 = 4636^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 26713721 - 2² = 26713717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26413721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13356860 + 13356861.

It is an arithmetic number, because the mean of its divisors is an integer number (13356861).

Almost surely, 2^26713721 is an apocalyptic number.

It is an amenable number.

26713721 is a deficient number, since it is larger than the sum of its proper divisors (1).

26713721 is an equidigital number, since it uses as much as digits as its factorization.

26713721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 29.

The square root of 26713721 is about 5168.5318031333. The cubic root of 26713721 is about 298.9359377748.

The spelling of 26713721 in words is "twenty-six million, seven hundred thirteen thousand, seven hundred twenty-one".