26481317 has 4 divisors (see below), whose sum is σ = 26508876. Its totient is φ = 26453760.

The previous prime is 26481313. The next prime is 26481361. The reversal of 26481317 is 71318462.

It is a Cunningham number, because it is equal to 5146²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22791076 + 3690241 = 4774^2 + 1921^2 .

It is a cyclic number.

It is not a de Polignac number, because 26481317 - 2² = 26481313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26481311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12284 + ... + 14277.

It is an arithmetic number, because the mean of its divisors is an integer number (6627219).

Almost surely, 2^26481317 is an apocalyptic number.

It is an amenable number.

26481317 is a deficient number, since it is larger than the sum of its proper divisors (27559).

26481317 is an equidigital number, since it uses as much as digits as its factorization.

26481317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27558.

The product of its digits is 8064, while the sum is 32.

The square root of 26481317 is about 5146.0000971628. Note that the first 4 decimals coincide. The cubic root of 26481317 is about 298.0665174397.

Adding to 26481317 its reverse (71318462), we get a palindrome (97799779).

The spelling of 26481317 in words is "twenty-six million, four hundred eighty-one thousand, three hundred seventeen".