97171738249 has 2 divisors, whose sum is σ = 97171738250. Its totient is φ = 97171738248.

The previous prime is 97171738241. The next prime is 97171738259. The reversal of 97171738249 is 94283717179.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64278475024 + 32893263225 = 253532^2 + 181365^2 .

It is a cyclic number.

It is not a de Polignac number, because 97171738249 - 2³ = 97171738241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97171738193 and 97171738202.

It is not a weakly prime, because it can be changed into another prime (97171738241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48585869124 + 48585869125.

It is an arithmetic number, because the mean of its divisors is an integer number (48585869125).

Almost surely, 2^97171738249 is an apocalyptic number.

It is an amenable number.

97171738249 is a deficient number, since it is larger than the sum of its proper divisors (1).

97171738249 is an equidigital number, since it uses as much as digits as its factorization.

97171738249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 58.

The spelling of 97171738249 in words is "ninety-seven billion, one hundred seventy-one million, seven hundred thirty-eight thousand, two hundred forty-nine".