26979221 has 16 divisors (see below), whose sum is σ = 30404160. Its totient is φ = 23788800.

The previous prime is 26979181. The next prime is 26979223. The reversal of 26979221 is 12297962.

It is a cyclic number.

It is not a de Polignac number, because 26979221 - 2⁶ = 26979157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26979223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32210 + ... + 33036.

It is an arithmetic number, because the mean of its divisors is an integer number (1900260).

Almost surely, 2^26979221 is an apocalyptic number.

It is an amenable number.

26979221 is a deficient number, since it is larger than the sum of its proper divisors (3424939).

26979221 is a wasteful number, since it uses less digits than its factorization.

26979221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964.

The product of its digits is 27216, while the sum is 38.

The square root of 26979221 is about 5194.1525776588. The cubic root of 26979221 is about 299.9230209899.

The spelling of 26979221 in words is "twenty-six million, nine hundred seventy-nine thousand, two hundred twenty-one".