26617961 has 4 divisors (see below), whose sum is σ = 27015312. Its totient is φ = 26220612.

The previous prime is 26617957. The next prime is 26617973. The reversal of 26617961 is 16971662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16971662 = 2 ⋅8485831.

It is a cyclic number.

It is not a de Polignac number, because 26617961 - 2² = 26617957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26617901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198575 + ... + 198708.

It is an arithmetic number, because the mean of its divisors is an integer number (6753828).

Almost surely, 2^26617961 is an apocalyptic number.

It is an amenable number.

26617961 is a deficient number, since it is larger than the sum of its proper divisors (397351).

26617961 is an equidigital number, since it uses as much as digits as its factorization.

26617961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397350.

The product of its digits is 27216, while the sum is 38.

The square root of 26617961 is about 5159.2597337215. The cubic root of 26617961 is about 298.5783140805.

The spelling of 26617961 in words is "twenty-six million, six hundred seventeen thousand, nine hundred sixty-one".