26920139 has 4 divisors (see below), whose sum is σ = 26936280. Its totient is φ = 26904000.

The previous prime is 26920111. The next prime is 26920141. The reversal of 26920139 is 93102962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93102962 = 2 ⋅46551481.

It is a cyclic number.

It is not a de Polignac number, because 26920139 - 2⁸ = 26919883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26920199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5237 + ... + 9014.

It is an arithmetic number, because the mean of its divisors is an integer number (6734070).

Almost surely, 2^26920139 is an apocalyptic number.

26920139 is a deficient number, since it is larger than the sum of its proper divisors (16141).

26920139 is a wasteful number, since it uses less digits than its factorization.

26920139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16140.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 26920139 is about 5188.4621035525. The cubic root of 26920139 is about 299.7039264161.

The spelling of 26920139 in words is "twenty-six million, nine hundred twenty thousand, one hundred thirty-nine".