26749979 has 2 divisors, whose sum is σ = 26749980. Its totient is φ = 26749978.

The previous prime is 26749963. The next prime is 26749991. The reversal of 26749979 is 97994762.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26749979 - 2⁴ = 26749963 is a prime.

It is a super-2 number, since 2×26749979² = 1431122753000882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26749979.

It is not a weakly prime, because it can be changed into another prime (26749949) 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 as a sum of consecutive naturals, namely, 13374989 + 13374990.

It is an arithmetic number, because the mean of its divisors is an integer number (13374990).

Almost surely, 2^26749979 is an apocalyptic number.

26749979 is a deficient number, since it is larger than the sum of its proper divisors (1).

26749979 is an equidigital number, since it uses as much as digits as its factorization.

26749979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 53.

The square root of 26749979 is about 5172.0381862473. The cubic root of 26749979 is about 299.0711232244.

The spelling of 26749979 in words is "twenty-six million, seven hundred forty-nine thousand, nine hundred seventy-nine".