26999979 has 4 divisors (see below), whose sum is σ = 35999976. Its totient is φ = 17999984.

The previous prime is 26999963. The next prime is 26999981. The reversal of 26999979 is 97999962.

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 26999979 - 2⁴ = 26999963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26999939) 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 3 ways as a sum of consecutive naturals, for example, 4499994 + ... + 4499999.

It is an arithmetic number, because the mean of its divisors is an integer number (8999994).

Almost surely, 2^26999979 is an apocalyptic number.

26999979 is a deficient number, since it is larger than the sum of its proper divisors (8999997).

26999979 is an equidigital number, since it uses as much as digits as its factorization.

26999979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999996.

The product of its digits is 4960116, while the sum is 60.

The square root of 26999979 is about 5196.1504019803. The cubic root of 26999979 is about 299.9999222222. Note that the first 4 decimals are identical.

The spelling of 26999979 in words is "twenty-six million, nine hundred ninety-nine thousand, nine hundred seventy-nine".