26974921 has 4 divisors (see below), whose sum is σ = 27278100. Its totient is φ = 26671744.

The previous prime is 26974919. The next prime is 26974939. The reversal of 26974921 is 12947962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12947962 = 2 ⋅6473981.

It can be written as a sum of positive squares in 2 ways, for example, as 3111696 + 23863225 = 1764^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 26974921 - 2¹ = 26974919 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26974951) 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, 151456 + ... + 151633.

It is an arithmetic number, because the mean of its divisors is an integer number (6819525).

Almost surely, 2^26974921 is an apocalyptic number.

It is an amenable number.

26974921 is a deficient number, since it is larger than the sum of its proper divisors (303179).

26974921 is an equidigital number, since it uses as much as digits as its factorization.

26974921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303178.

The product of its digits is 54432, while the sum is 40.

The square root of 26974921 is about 5193.7386341633. The cubic root of 26974921 is about 299.9070860411.

The spelling of 26974921 in words is "twenty-six million, nine hundred seventy-four thousand, nine hundred twenty-one".