26100989 has 4 divisors (see below), whose sum is σ = 26490624. Its totient is φ = 25711356.

The previous prime is 26100983. The next prime is 26101037. The reversal of 26100989 is 98900162.

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.

It is a cyclic number.

It is not a de Polignac number, because 26100989 - 2⁴ = 26100973 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 (26100983) 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, 194717 + ... + 194850.

It is an arithmetic number, because the mean of its divisors is an integer number (6622656).

Almost surely, 2^26100989 is an apocalyptic number.

It is an amenable number.

26100989 is a deficient number, since it is larger than the sum of its proper divisors (389635).

26100989 is an equidigital number, since it uses as much as digits as its factorization.

26100989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389634.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 26100989 is about 5108.9127023272. The cubic root of 26100989 is about 296.6326747795.

The spelling of 26100989 in words is "twenty-six million, one hundred thousand, nine hundred eighty-nine".