26989971 has 8 divisors (see below), whose sum is σ = 37551360. Its totient is φ = 17210952.

The previous prime is 26989969. The next prime is 26989973. The reversal of 26989971 is 17998962.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26989969) and next prime (26989973).

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

It is not a de Polignac number, because 26989971 - 2¹ = 26989969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26989973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195511 + ... + 195648.

It is an arithmetic number, because the mean of its divisors is an integer number (4693920).

Almost surely, 2^26989971 is an apocalyptic number.

26989971 is a deficient number, since it is larger than the sum of its proper divisors (10561389).

26989971 is a wasteful number, since it uses less digits than its factorization.

26989971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391185.

The product of its digits is 489888, while the sum is 51.

The square root of 26989971 is about 5195.1872921003. The cubic root of 26989971 is about 299.9628509556.

The spelling of 26989971 in words is "twenty-six million, nine hundred eighty-nine thousand, nine hundred seventy-one".