97309788 has 12 divisors (see below), whose sum is σ = 227056200. Its totient is φ = 32436592.

The previous prime is 97309783. The next prime is 97309799. The reversal of 97309788 is 88790379.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 97309788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97309783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4054563 + ... + 4054586.

It is an arithmetic number, because the mean of its divisors is an integer number (18921350).

Almost surely, 2^97309788 is an apocalyptic number.

It is an amenable number.

97309788 is an abundant number, since it is smaller than the sum of its proper divisors (129746412).

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

97309788 is a wasteful number, since it uses less digits than its factorization.

97309788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8109156 (or 8109154 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 97309788 is about 9864.5723678221. The cubic root of 97309788 is about 459.9587045475.

The spelling of 97309788 in words is "ninety-seven million, three hundred nine thousand, seven hundred eighty-eight".