26198149 has 4 divisors (see below), whose sum is σ = 26212780. Its totient is φ = 26183520.

The previous prime is 26198141. The next prime is 26198171. The reversal of 26198149 is 94189162.

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 22867524 + 3330625 = 4782^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 26198149 - 2³ = 26198141 is a prime.

It is a super-2 number, since 2×26198149² = 1372686022052402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26198141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4182 + ... + 8359.

It is an arithmetic number, because the mean of its divisors is an integer number (6553195).

Almost surely, 2^26198149 is an apocalyptic number.

It is an amenable number.

26198149 is a deficient number, since it is larger than the sum of its proper divisors (14631).

26198149 is a wasteful number, since it uses less digits than its factorization.

26198149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14630.

The product of its digits is 31104, while the sum is 40.

The square root of 26198149 is about 5118.4127422473. The cubic root of 26198149 is about 297.0002871964. Note that the first 3 decimals are identical.

The spelling of 26198149 in words is "twenty-six million, one hundred ninety-eight thousand, one hundred forty-nine".