97909812 has 324 divisors, whose sum is σ = 354375840. Its totient is φ = 22239360.

The previous prime is 97909769. The next prime is 97909853. The reversal of 97909812 is 21890979.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 5153139 + ... + 5153157.

Almost surely, 2^97909812 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 97909812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177187920).

97909812 is an abundant number, since it is smaller than the sum of its proper divisors (256466028).

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

97909812 is a wasteful number, since it uses less digits than its factorization.

97909812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 97909812 is about 9894.9387062275. The cubic root of 97909812 is about 460.9021551762.

It can be divided in two parts, 97 and 909812, that added together give a palindrome (909909).

The spelling of 97909812 in words is "ninety-seven million, nine hundred nine thousand, eight hundred twelve".