26139007 has 4 divisors (see below), whose sum is σ = 26295696. Its totient is φ = 25982320.

The previous prime is 26138993. The next prime is 26139011. The reversal of 26139007 is 70093162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70093162 = 2 ⋅35046581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26139007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26139067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78094 + ... + 78427.

It is an arithmetic number, because the mean of its divisors is an integer number (6573924).

Almost surely, 2^26139007 is an apocalyptic number.

26139007 is a deficient number, since it is larger than the sum of its proper divisors (156689).

26139007 is a wasteful number, since it uses less digits than its factorization.

26139007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156688.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 26139007 is about 5112.6321009828. The cubic root of 26139007 is about 296.7766273070.

The spelling of 26139007 in words is "twenty-six million, one hundred thirty-nine thousand, seven".