97561420 has 48 divisors (see below), whose sum is σ = 224437248. Its totient is φ = 35328960.

The previous prime is 97561417. The next prime is 97561421. The reversal of 97561420 is 2416579.

It is not an unprimeable number, because it can be changed into a prime (97561421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 61477 + ... + 63043.

It is an arithmetic number, because the mean of its divisors is an integer number (4675776).

Almost surely, 2^97561420 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 97561420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112218624).

97561420 is an abundant number, since it is smaller than the sum of its proper divisors (126875828).

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

97561420 is a wasteful number, since it uses less digits than its factorization.

97561420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 97561420 is about 9877.3184620118. The cubic root of 97561420 is about 460.3548301940.

Adding to 97561420 its reverse (2416579), we get a palindrome (99977999).

The spelling of 97561420 in words is "ninety-seven million, five hundred sixty-one thousand, four hundred twenty".