26129387 has 2 divisors, whose sum is σ = 26129388. Its totient is φ = 26129386.

The previous prime is 26129381. The next prime is 26129399. The reversal of 26129387 is 78392162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26129387 - 2¹⁸ = 25867243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26129387.

It is not a weakly prime, because it can be changed into another prime (26129381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13064693 + 13064694.

It is an arithmetic number, because the mean of its divisors is an integer number (13064694).

Almost surely, 2^26129387 is an apocalyptic number.

26129387 is a deficient number, since it is larger than the sum of its proper divisors (1).

26129387 is an equidigital number, since it uses as much as digits as its factorization.

26129387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 26129387 is about 5111.6912074185. The cubic root of 26129387 is about 296.7402150405.

The spelling of 26129387 in words is "twenty-six million, one hundred twenty-nine thousand, three hundred eighty-seven".