26699945 has 8 divisors (see below), whose sum is σ = 33924744. Its totient is φ = 20103424.

The previous prime is 26699927. The next prime is 26699957. The reversal of 26699945 is 54999662.

It can be written as a sum of positive squares in 4 ways, for example, as 4393216 + 22306729 = 2096^2 + 4723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26699945 - 2¹⁰ = 26698921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26699893 and 26699902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156974 + ... + 157143.

It is an arithmetic number, because the mean of its divisors is an integer number (4240593).

Almost surely, 2^26699945 is an apocalyptic number.

It is an amenable number.

26699945 is a deficient number, since it is larger than the sum of its proper divisors (7224799).

26699945 is a wasteful number, since it uses less digits than its factorization.

26699945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314139.

The product of its digits is 1049760, while the sum is 50.

The square root of 26699945 is about 5167.1989510759. The cubic root of 26699945 is about 298.8845428433.

The spelling of 26699945 in words is "twenty-six million, six hundred ninety-nine thousand, nine hundred forty-five".