97621220 has 12 divisors (see below), whose sum is σ = 205004604. Its totient is φ = 39048480.

The previous prime is 97621159. The next prime is 97621231. The reversal of 97621220 is 2212679.

It can be written as a sum of positive squares in 2 ways, for example, as 39037504 + 58583716 = 6248^2 + 7654^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440511 + ... + 2440550.

It is an arithmetic number, because the mean of its divisors is an integer number (17083717).

Almost surely, 2^97621220 is an apocalyptic number.

It is an amenable number.

97621220 is an abundant number, since it is smaller than the sum of its proper divisors (107383384).

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

97621220 is a wasteful number, since it uses less digits than its factorization.

97621220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881070 (or 4881068 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 97621220 is about 9880.3451356721. The cubic root of 97621220 is about 460.4488687190.

Adding to 97621220 its reverse (2212679), we get a palindrome (99833899).

It can be divided in two parts, 9762 and 1220, that multiplied together give a triangular number (11909640 = T₄₈₈₀).

The spelling of 97621220 in words is "ninety-seven million, six hundred twenty-one thousand, two hundred twenty".