27961197 has 8 divisors (see below), whose sum is σ = 40670880. Its totient is φ = 16946160.

The previous prime is 27961187. The next prime is 27961207. The reversal of 27961197 is 79116972.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27961187) and next prime (27961207).

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

It is not a de Polignac number, because 27961197 - 2⁷ = 27961069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27961187) 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, 423622 + ... + 423687.

It is an arithmetic number, because the mean of its divisors is an integer number (5083860).

Almost surely, 2^27961197 is an apocalyptic number.

It is an amenable number.

27961197 is a deficient number, since it is larger than the sum of its proper divisors (12709683).

27961197 is a wasteful number, since it uses less digits than its factorization.

27961197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847323.

The product of its digits is 47628, while the sum is 42.

The square root of 27961197 is about 5287.8348120946. The cubic root of 27961197 is about 303.5185600046.

It can be divided in two parts, 2796 and 1197, that added together give a palindrome (3993).

The spelling of 27961197 in words is "twenty-seven million, nine hundred sixty-one thousand, one hundred ninety-seven".