26987129 has 8 divisors (see below), whose sum is σ = 29108352. Its totient is φ = 24872400.

The previous prime is 26987113. The next prime is 26987137. The reversal of 26987129 is 92178962.

It is a happy number.

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 26987129 - 2⁴ = 26987113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26987129.

It is not an unprimeable number, because it can be changed into a prime (26987189) 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, 10304 + ... + 12654.

It is an arithmetic number, because the mean of its divisors is an integer number (3638544).

Almost surely, 2^26987129 is an apocalyptic number.

It is an amenable number.

26987129 is a deficient number, since it is larger than the sum of its proper divisors (2121223).

26987129 is a wasteful number, since it uses less digits than its factorization.

26987129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247.

The product of its digits is 108864, while the sum is 44.

The square root of 26987129 is about 5194.9137625181. The cubic root of 26987129 is about 299.9523220527.

The spelling of 26987129 in words is "twenty-six million, nine hundred eighty-seven thousand, one hundred twenty-nine".