26193691 has 2 divisors, whose sum is σ = 26193692. Its totient is φ = 26193690.

The previous prime is 26193613. The next prime is 26193703. The reversal of 26193691 is 19639162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26193691 - 2¹³ = 26185499 is a prime.

It is a super-2 number, since 2×26193691² = 1372218896406962, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26193691.

It is not a weakly prime, because it can be changed into another prime (26193091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13096845 + 13096846.

It is an arithmetic number, because the mean of its divisors is an integer number (13096846).

Almost surely, 2^26193691 is an apocalyptic number.

26193691 is a deficient number, since it is larger than the sum of its proper divisors (1).

26193691 is an equidigital number, since it uses as much as digits as its factorization.

26193691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 26193691 is about 5117.9772371514. The cubic root of 26193691 is about 296.9834399198.

The spelling of 26193691 in words is "twenty-six million, one hundred ninety-three thousand, six hundred ninety-one".