26749139 has 4 divisors (see below), whose sum is σ = 27371256. Its totient is φ = 26127024.

The previous prime is 26749133. The next prime is 26749159. The reversal of 26749139 is 93194762.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26749139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26749096 and 26749105.

It is not an unprimeable number, because it can be changed into a prime (26749133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310994 + ... + 311079.

It is an arithmetic number, because the mean of its divisors is an integer number (6842814).

Almost surely, 2^26749139 is an apocalyptic number.

26749139 is a deficient number, since it is larger than the sum of its proper divisors (622117).

26749139 is an equidigital number, since it uses as much as digits as its factorization.

26749139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622116.

The product of its digits is 81648, while the sum is 41.

The square root of 26749139 is about 5171.9569797128. The cubic root of 26749139 is about 299.0679927251.

The spelling of 26749139 in words is "twenty-six million, seven hundred forty-nine thousand, one hundred thirty-nine".