26345987 has 4 divisors (see below), whose sum is σ = 26363880. Its totient is φ = 26328096.

The previous prime is 26345983. The next prime is 26345993. The reversal of 26345987 is 78954362.

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

It is a cyclic number.

It is not a de Polignac number, because 26345987 - 2² = 26345983 is a prime.

It is a super-2 number, since 2×26345987² = 1388222062008338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26345981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6518 + ... + 9755.

It is an arithmetic number, because the mean of its divisors is an integer number (6590970).

Almost surely, 2^26345987 is an apocalyptic number.

26345987 is a deficient number, since it is larger than the sum of its proper divisors (17893).

26345987 is a wasteful number, since it uses less digits than its factorization.

26345987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17892.

The product of its digits is 362880, while the sum is 44.

The square root of 26345987 is about 5132.8342073361. The cubic root of 26345987 is about 297.5579041305.

The spelling of 26345987 in words is "twenty-six million, three hundred forty-five thousand, nine hundred eighty-seven".