97771212 has 120 divisors (see below), whose sum is σ = 318743040. Its totient is φ = 25388640.

The previous prime is 97771171. The next prime is 97771213. The reversal of 97771212 is 21217779.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (97771213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22989 + ... + 26907.

It is an arithmetic number, because the mean of its divisors is an integer number (2656192).

Almost surely, 2^97771212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97771212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159371520).

97771212 is an abundant number, since it is smaller than the sum of its proper divisors (220971828).

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

97771212 is a wasteful number, since it uses less digits than its factorization.

97771212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953 (or 3942 counting only the distinct ones).

The product of its digits is 12348, while the sum is 36.

The square root of 97771212 is about 9887.9326454017. The cubic root of 97771212 is about 460.6845698828.

The spelling of 97771212 in words is "ninety-seven million, seven hundred seventy-one thousand, two hundred twelve".