97801817 has 2 divisors, whose sum is σ = 97801818. Its totient is φ = 97801816.

The previous prime is 97801813. The next prime is 97801853. The reversal of 97801817 is 71810879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49970761 + 47831056 = 7069^2 + 6916^2 .

It is a cyclic number.

It is not a de Polignac number, because 97801817 - 2² = 97801813 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97801813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48900908 + 48900909.

It is an arithmetic number, because the mean of its divisors is an integer number (48900909).

Almost surely, 2^97801817 is an apocalyptic number.

It is an amenable number.

97801817 is a deficient number, since it is larger than the sum of its proper divisors (1).

97801817 is an equidigital number, since it uses as much as digits as its factorization.

97801817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 97801817 is about 9889.4801177817. The cubic root of 97801817 is about 460.7326337252.

The spelling of 97801817 in words is "ninety-seven million, eight hundred one thousand, eight hundred seventeen".