26139739 has 2 divisors, whose sum is σ = 26139740. Its totient is φ = 26139738.

The previous prime is 26139713. The next prime is 26139749. The reversal of 26139739 is 93793162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26139739 - 2¹⁷ = 26008667 is a prime.

It is not a weakly prime, because it can be changed into another prime (26139749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069869 + 13069870.

It is an arithmetic number, because the mean of its divisors is an integer number (13069870).

Almost surely, 2^26139739 is an apocalyptic number.

26139739 is a deficient number, since it is larger than the sum of its proper divisors (1).

26139739 is an equidigital number, since it uses as much as digits as its factorization.

26139739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 40.

The square root of 26139739 is about 5112.7036878740. The cubic root of 26139739 is about 296.7793976044.

It can be divided in two parts, 261 and 39739, that added together give a square (40000 = 200²).

The spelling of 26139739 in words is "twenty-six million, one hundred thirty-nine thousand, seven hundred thirty-nine".