26539969 has 2 divisors, whose sum is σ = 26539970. Its totient is φ = 26539968.

The previous prime is 26539963. The next prime is 26539991. The reversal of 26539969 is 96993562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16711744 + 9828225 = 4088^2 + 3135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26539969 is a prime.

It is a super-2 number, since 2×26539969² = 1408739909041922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26539963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13269984 + 13269985.

It is an arithmetic number, because the mean of its divisors is an integer number (13269985).

Almost surely, 2^26539969 is an apocalyptic number.

It is an amenable number.

26539969 is a deficient number, since it is larger than the sum of its proper divisors (1).

26539969 is an equidigital number, since it uses as much as digits as its factorization.

26539969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 26539969 is about 5151.6957402393. The cubic root of 26539969 is about 298.2864121735.

The spelling of 26539969 in words is "twenty-six million, five hundred thirty-nine thousand, nine hundred sixty-nine".