26979479 has 4 divisors (see below), whose sum is σ = 27061320. Its totient is φ = 26897640.

The previous prime is 26979451. The next prime is 26979481. The reversal of 26979479 is 97497962.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97497962 = 2 ⋅48748981.

It is a cyclic number.

It is not a de Polignac number, because 26979479 - 2⁸ = 26979223 is a prime.

It is a super-2 number, since 2×26979479² = 1455784574222882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26979479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26979419) 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, 40424 + ... + 41085.

It is an arithmetic number, because the mean of its divisors is an integer number (6765330).

Almost surely, 2^26979479 is an apocalyptic number.

26979479 is a deficient number, since it is larger than the sum of its proper divisors (81841).

26979479 is an equidigital number, since it uses as much as digits as its factorization.

26979479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81840.

The product of its digits is 1714608, while the sum is 53.

The square root of 26979479 is about 5194.1774132195. The cubic root of 26979479 is about 299.9239770330.

The spelling of 26979479 in words is "twenty-six million, nine hundred seventy-nine thousand, four hundred seventy-nine".