26621893 has 2 divisors, whose sum is σ = 26621894. Its totient is φ = 26621892.

The previous prime is 26621891. The next prime is 26621897. The reversal of 26621893 is 39812662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 8661249 = 4238^2 + 2943^2 .

It is a cyclic number.

It is not a de Polignac number, because 26621893 - 2¹ = 26621891 is a prime.

Together with 26621891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26621891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13310946 + 13310947.

It is an arithmetic number, because the mean of its divisors is an integer number (13310947).

Almost surely, 2^26621893 is an apocalyptic number.

It is an amenable number.

26621893 is a deficient number, since it is larger than the sum of its proper divisors (1).

26621893 is an equidigital number, since it uses as much as digits as its factorization.

26621893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 26621893 is about 5159.6407820700. The cubic root of 26621893 is about 298.5930153334.

The spelling of 26621893 in words is "twenty-six million, six hundred twenty-one thousand, eight hundred ninety-three".