26131947 has 4 divisors (see below), whose sum is σ = 34842600. Its totient is φ = 17421296.

The previous prime is 26131927. The next prime is 26131949. The reversal of 26131947 is 74913162.

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

It is a cyclic number.

It is not a de Polignac number, because 26131947 - 2¹² = 26127851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26131949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4355322 + ... + 4355327.

It is an arithmetic number, because the mean of its divisors is an integer number (8710650).

Almost surely, 2^26131947 is an apocalyptic number.

26131947 is a deficient number, since it is larger than the sum of its proper divisors (8710653).

26131947 is an equidigital number, since it uses as much as digits as its factorization.

26131947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8710652.

The product of its digits is 9072, while the sum is 33.

The square root of 26131947 is about 5111.9416076477. The cubic root of 26131947 is about 296.7499056639.

It can be divided in two parts, 2613 and 1947, that added together give a triangular number (4560 = T₉₅).

The spelling of 26131947 in words is "twenty-six million, one hundred thirty-one thousand, nine hundred forty-seven".