97209547 has 2 divisors, whose sum is σ = 97209548. Its totient is φ = 97209546.

The previous prime is 97209509. The next prime is 97209551. The reversal of 97209547 is 74590279.

It is a strong prime.

It is an emirp because it is prime and its reverse (74590279) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97209547 is a prime.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (97209557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48604773 + 48604774.

It is an arithmetic number, because the mean of its divisors is an integer number (48604774).

Almost surely, 2^97209547 is an apocalyptic number.

97209547 is a deficient number, since it is larger than the sum of its proper divisors (1).

97209547 is an equidigital number, since it uses as much as digits as its factorization.

97209547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 97209547 is about 9859.4901998024. The cubic root of 97209547 is about 459.8007123510.

The spelling of 97209547 in words is "ninety-seven million, two hundred nine thousand, five hundred forty-seven".