26679391 has 4 divisors (see below), whose sum is σ = 27599400. Its totient is φ = 25759384.

The previous prime is 26679371. The next prime is 26679403. The reversal of 26679391 is 19397662.

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-26679391 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 (26679371) 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, 459961 + ... + 460018.

It is an arithmetic number, because the mean of its divisors is an integer number (6899850).

Almost surely, 2^26679391 is an apocalyptic number.

26679391 is a deficient number, since it is larger than the sum of its proper divisors (920009).

26679391 is an equidigital number, since it uses as much as digits as its factorization.

26679391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920008.

The product of its digits is 122472, while the sum is 43.

The square root of 26679391 is about 5165.2096762861. The cubic root of 26679391 is about 298.8078279542.

The spelling of 26679391 in words is "twenty-six million, six hundred seventy-nine thousand, three hundred ninety-one".