26129429 has 2 divisors, whose sum is σ = 26129430. Its totient is φ = 26129428.

The previous prime is 26129419. The next prime is 26129473. The reversal of 26129429 is 92492162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 4831204 = 4615^2 + 2198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26129429 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26129419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13064714 + 13064715.

It is an arithmetic number, because the mean of its divisors is an integer number (13064715).

Almost surely, 2^26129429 is an apocalyptic number.

It is an amenable number.

26129429 is a deficient number, since it is larger than the sum of its proper divisors (1).

26129429 is an equidigital number, since it uses as much as digits as its factorization.

26129429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 26129429 is about 5111.6953156463. The cubic root of 26129429 is about 296.7403740324.

The spelling of 26129429 in words is "twenty-six million, one hundred twenty-nine thousand, four hundred twenty-nine".