97861973 has 4 divisors (see below), whose sum is σ = 106758528. Its totient is φ = 88965420.

The previous prime is 97861963. The next prime is 97861999. The reversal of 97861973 is 37916879.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97861973 - 2⁸ = 97861717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97861963) 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 3 ways as a sum of consecutive naturals, for example, 4448261 + ... + 4448282.

It is an arithmetic number, because the mean of its divisors is an integer number (26689632).

Almost surely, 2^97861973 is an apocalyptic number.

It is an amenable number.

97861973 is a deficient number, since it is larger than the sum of its proper divisors (8896555).

97861973 is a wasteful number, since it uses less digits than its factorization.

97861973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8896554.

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

The square root of 97861973 is about 9892.5210639149. The cubic root of 97861973 is about 460.8270769323.

The spelling of 97861973 in words is "ninety-seven million, eight hundred sixty-one thousand, nine hundred seventy-three".