97897973 has 2 divisors, whose sum is σ = 97897974. Its totient is φ = 97897972.

The previous prime is 97897931. The next prime is 97897999. The reversal of 97897973 is 37979879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83594449 + 14303524 = 9143^2 + 3782^2 .

It is a cyclic number.

It is not a de Polignac number, because 97897973 - 2⁸ = 97897717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97897903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48948986 + 48948987.

It is an arithmetic number, because the mean of its divisors is an integer number (48948987).

Almost surely, 2^97897973 is an apocalyptic number.

It is an amenable number.

97897973 is a deficient number, since it is larger than the sum of its proper divisors (1).

97897973 is an equidigital number, since it uses as much as digits as its factorization.

97897973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6001128, while the sum is 59.

The square root of 97897973 is about 9894.3404530065. The cubic root of 97897973 is about 460.8835773972.

The spelling of 97897973 in words is "ninety-seven million, eight hundred ninety-seven thousand, nine hundred seventy-three".