26870191 has 4 divisors (see below), whose sum is σ = 27210400. Its totient is φ = 26529984.

The previous prime is 26870189. The next prime is 26870197. The reversal of 26870191 is 19107862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26870191 - 2¹ = 26870189 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 (26870197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169986 + ... + 170143.

It is an arithmetic number, because the mean of its divisors is an integer number (6802600).

Almost surely, 2^26870191 is an apocalyptic number.

26870191 is a deficient number, since it is larger than the sum of its proper divisors (340209).

26870191 is an equidigital number, since it uses as much as digits as its factorization.

26870191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340208.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 26870191 is about 5183.6464964347. The cubic root of 26870191 is about 299.5184533823.

The spelling of 26870191 in words is "twenty-six million, eight hundred seventy thousand, one hundred ninety-one".