97218871 has 4 divisors (see below), whose sum is σ = 97238592. Its totient is φ = 97199152.

The previous prime is 97218851. The next prime is 97218893. The reversal of 97218871 is 17881279.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 97218871 - 2¹⁹ = 96694583 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 (97218851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4890 + ... + 14776.

It is an arithmetic number, because the mean of its divisors is an integer number (24309648).

Almost surely, 2^97218871 is an apocalyptic number.

97218871 is a deficient number, since it is larger than the sum of its proper divisors (19721).

97218871 is an equidigital number, since it uses as much as digits as its factorization.

97218871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19720.

The product of its digits is 56448, while the sum is 43.

The square root of 97218871 is about 9859.9630323851. The cubic root of 97218871 is about 459.8154127068.

It can be divided in two parts, 97218 and 871, that added together give a palindrome (98089).

The spelling of 97218871 in words is "ninety-seven million, two hundred eighteen thousand, eight hundred seventy-one".