26971979 has 4 divisors (see below), whose sum is σ = 28558584. Its totient is φ = 25385376.

The previous prime is 26971951. The next prime is 26971981. The reversal of 26971979 is 97917962.

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 26971979 - 2¹⁶ = 26906443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26971999) 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, 793277 + ... + 793310.

It is an arithmetic number, because the mean of its divisors is an integer number (7139646).

Almost surely, 2^26971979 is an apocalyptic number.

26971979 is a deficient number, since it is larger than the sum of its proper divisors (1586605).

26971979 is a wasteful number, since it uses less digits than its factorization.

26971979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586604.

The product of its digits is 428652, while the sum is 50.

The square root of 26971979 is about 5193.4554007905. The cubic root of 26971979 is about 299.8961825958.

The spelling of 26971979 in words is "twenty-six million, nine hundred seventy-one thousand, nine hundred seventy-nine".