97919816 has 8 divisors (see below), whose sum is σ = 183599670. Its totient is φ = 48959904.

The previous prime is 97919771. The next prime is 97919819. The reversal of 97919816 is 61891979.

It can be written as a sum of positive squares in only one way, i.e., 79032100 + 18887716 = 8890^2 + 4346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (97919819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119981 + ... + 6119996.

Almost surely, 2^97919816 is an apocalyptic number.

It is an amenable number.

97919816 is a deficient number, since it is larger than the sum of its proper divisors (85679854).

97919816 is a wasteful number, since it uses less digits than its factorization.

97919816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239983 (or 12239979 counting only the distinct ones).

The product of its digits is 244944, while the sum is 50.

The square root of 97919816 is about 9895.4442042791. Note that the first 3 decimals coincide. The cubic root of 97919816 is about 460.9178523028.

The spelling of 97919816 in words is "ninety-seven million, nine hundred nineteen thousand, eight hundred sixteen".