26779891 has 2 divisors, whose sum is σ = 26779892. Its totient is φ = 26779890.

The previous prime is 26779861. The next prime is 26779901. The reversal of 26779891 is 19897762.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26779891 - 2⁵ = 26779859 is a prime.

It is not a weakly prime, because it can be changed into another prime (26779861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13389945 + 13389946.

It is an arithmetic number, because the mean of its divisors is an integer number (13389946).

Almost surely, 2^26779891 is an apocalyptic number.

26779891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26779891 is an equidigital number, since it uses as much as digits as its factorization.

26779891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 49.

The square root of 26779891 is about 5174.9290816397. The cubic root of 26779891 is about 299.1825561229.

The spelling of 26779891 in words is "twenty-six million, seven hundred seventy-nine thousand, eight hundred ninety-one".