26780099 has 4 divisors (see below), whose sum is σ = 27402936. Its totient is φ = 26157264.

The previous prime is 26780081. The next prime is 26780107. The reversal of 26780099 is 99008762.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26780099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26780009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311354 + ... + 311439.

It is an arithmetic number, because the mean of its divisors is an integer number (6850734).

Almost surely, 2^26780099 is an apocalyptic number.

26780099 is a deficient number, since it is larger than the sum of its proper divisors (622837).

26780099 is an equidigital number, since it uses as much as digits as its factorization.

26780099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622836.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 26780099 is about 5174.9491784944. The cubic root of 26780099 is about 299.1833307067.

The spelling of 26780099 in words is "twenty-six million, seven hundred eighty thousand, ninety-nine".