26409979 has 2 divisors, whose sum is σ = 26409980. Its totient is φ = 26409978.

The previous prime is 26409973. The next prime is 26410009. The reversal of 26409979 is 97990462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26409979 - 2⁵ = 26409947 is a prime.

It is not a weakly prime, because it can be changed into another prime (26409973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13204989 + 13204990.

It is an arithmetic number, because the mean of its divisors is an integer number (13204990).

Almost surely, 2^26409979 is an apocalyptic number.

26409979 is a deficient number, since it is larger than the sum of its proper divisors (1).

26409979 is an equidigital number, since it uses as much as digits as its factorization.

26409979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 26409979 is about 5139.0640198386. The cubic root of 26409979 is about 297.7986230127.

The spelling of 26409979 in words is "twenty-six million, four hundred nine thousand, nine hundred seventy-nine".