27980197 has 8 divisors (see below), whose sum is σ = 33009152. Its totient is φ = 23209200.

The previous prime is 27980153. The next prime is 27980201. The reversal of 27980197 is 79108972.

It is a happy number.

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

It is not a de Polignac number, because 27980197 - 2¹¹ = 27978149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27980137) 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, 64254 + ... + 64687.

It is an arithmetic number, because the mean of its divisors is an integer number (4126144).

Almost surely, 2^27980197 is an apocalyptic number.

It is an amenable number.

27980197 is a deficient number, since it is larger than the sum of its proper divisors (5028955).

27980197 is a wasteful number, since it uses less digits than its factorization.

27980197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128979.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 27980197 is about 5289.6310835445. The cubic root of 27980197 is about 303.5872927191.

The spelling of 27980197 in words is "twenty-seven million, nine hundred eighty thousand, one hundred ninety-seven".