97397861 has 6 divisors (see below), whose sum is σ = 107057286. Its totient is φ = 88543400.

The previous prime is 97397831. The next prime is 97397917. The reversal of 97397861 is 16879379.

It can be written as a sum of positive squares in only one way, i.e., 88247236 + 9150625 = 9394^2 + 3025^2 .

It is not a de Polignac number, because 97397861 - 2¹⁴ = 97381477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97397831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402350 + ... + 402591.

It is an arithmetic number, because the mean of its divisors is an integer number (17842881).

Almost surely, 2^97397861 is an apocalyptic number.

It is an amenable number.

97397861 is a deficient number, since it is larger than the sum of its proper divisors (9659425).

97397861 is a wasteful number, since it uses less digits than its factorization.

97397861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804963 (or 804952 counting only the distinct ones).

The product of its digits is 571536, while the sum is 50.

The square root of 97397861 is about 9869.0354645224. The cubic root of 97397861 is about 460.0974289533.

The spelling of 97397861 in words is "ninety-seven million, three hundred ninety-seven thousand, eight hundred sixty-one".