97477218 has 48 divisors (see below), whose sum is σ = 225159480. Its totient is φ = 30371328.

The previous prime is 97477217. The next prime is 97477223. The reversal of 97477218 is 81277479.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97476129 + 1089 = 9873^2 + 33^2 .

It is not an unprimeable number, because it can be changed into a prime (97477217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47028 + ... + 49056.

Almost surely, 2^97477218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97477218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112579740).

97477218 is an abundant number, since it is smaller than the sum of its proper divisors (127682262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97477218 is a wasteful number, since it uses less digits than its factorization.

97477218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2208 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 97477218 is about 9873.0551502562. The cubic root of 97477218 is about 460.2223531200. Note that the first 3 decimals are identical.

The spelling of 97477218 in words is "ninety-seven million, four hundred seventy-seven thousand, two hundred eighteen".