26369989 has 4 divisors (see below), whose sum is σ = 26631180. Its totient is φ = 26108800.

The previous prime is 26369953. The next prime is 26370007. The reversal of 26369989 is 98996362.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25250625 + 1119364 = 5025^2 + 1058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26369989 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 (26361989) 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, 130444 + ... + 130645.

It is an arithmetic number, because the mean of its divisors is an integer number (6657795).

Almost surely, 2^26369989 is an apocalyptic number.

It is an amenable number.

26369989 is a deficient number, since it is larger than the sum of its proper divisors (261191).

26369989 is a wasteful number, since it uses less digits than its factorization.

26369989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261190.

The product of its digits is 1259712, while the sum is 52.

The square root of 26369989 is about 5135.1717595422. The cubic root of 26369989 is about 297.6482381544.

The spelling of 26369989 in words is "twenty-six million, three hundred sixty-nine thousand, nine hundred eighty-nine".