26930681 has 8 divisors (see below), whose sum is σ = 27236040. Its totient is φ = 26627328.

The previous prime is 26930639. The next prime is 26930693. The reversal of 26930681 is 18603962.

It can be written as a sum of positive squares in 4 ways, for example, as 2920681 + 24010000 = 1709^2 + 4900^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26930681 is a prime.

It is a super-2 number, since 2×26930681² = 1450523158247522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26930611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52655 + ... + 53163.

It is an arithmetic number, because the mean of its divisors is an integer number (3404505).

Almost surely, 2^26930681 is an apocalyptic number.

It is an amenable number.

26930681 is a deficient number, since it is larger than the sum of its proper divisors (305359).

26930681 is a wasteful number, since it uses less digits than its factorization.

26930681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 26930681 is about 5189.4779120833. The cubic root of 26930681 is about 299.7430429360.

The spelling of 26930681 in words is "twenty-six million, nine hundred thirty thousand, six hundred eighty-one".