245580197 has 2 divisors, whose sum is σ = 245580198. Its totient is φ = 245580196.

The previous prime is 245580173. The next prime is 245580229. The reversal of 245580197 is 791085542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139098436 + 106481761 = 11794^2 + 10319^2 .

It is a cyclic number.

It is not a de Polignac number, because 245580197 - 2²⁶ = 178471333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245583197) 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 as a sum of consecutive naturals, namely, 122790098 + 122790099.

It is an arithmetic number, because the mean of its divisors is an integer number (122790099).

Almost surely, 2^245580197 is an apocalyptic number.

It is an amenable number.

245580197 is a deficient number, since it is larger than the sum of its proper divisors (1).

245580197 is an equidigital number, since it uses as much as digits as its factorization.

245580197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 245580197 is about 15670.9985961329. The cubic root of 245580197 is about 626.2260281686.

The spelling of 245580197 in words is "two hundred forty-five million, five hundred eighty thousand, one hundred ninety-seven".