26531139 has 4 divisors (see below), whose sum is σ = 35374856. Its totient is φ = 17687424.

The previous prime is 26531093. The next prime is 26531159. The reversal of 26531139 is 93113562.

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

It is not a de Polignac number, because 26531139 - 2⁹ = 26530627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26531159) 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, 4421854 + ... + 4421859.

It is an arithmetic number, because the mean of its divisors is an integer number (8843714).

Almost surely, 2^26531139 is an apocalyptic number.

26531139 is a deficient number, since it is larger than the sum of its proper divisors (8843717).

26531139 is an equidigital number, since it uses as much as digits as its factorization.

26531139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8843716.

The product of its digits is 4860, while the sum is 30.

The square root of 26531139 is about 5150.8386695761. The cubic root of 26531139 is about 298.2533279704.

The spelling of 26531139 in words is "twenty-six million, five hundred thirty-one thousand, one hundred thirty-nine".