26143969 has 2 divisors, whose sum is σ = 26143970. Its totient is φ = 26143968.

The previous prime is 26143967. The next prime is 26144009. The reversal of 26143969 is 96934162.

It is an a-pointer prime, because the next prime (26144009) can be obtained adding 26143969 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26061025 + 82944 = 5105^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 26143969 - 2¹ = 26143967 is a prime.

It is a super-2 number, since 2×26143969² = 1367014230145922, which contains 22 as substring.

Together with 26143967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26143961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13071984 + 13071985.

It is an arithmetic number, because the mean of its divisors is an integer number (13071985).

Almost surely, 2^26143969 is an apocalyptic number.

It is an amenable number.

26143969 is a deficient number, since it is larger than the sum of its proper divisors (1).

26143969 is an equidigital number, since it uses as much as digits as its factorization.

26143969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 26143969 is about 5113.1173465900. The cubic root of 26143969 is about 296.7954052768.

The spelling of 26143969 in words is "twenty-six million, one hundred forty-three thousand, nine hundred sixty-nine".