97727647 has 2 divisors, whose sum is σ = 97727648. Its totient is φ = 97727646.

The previous prime is 97727639. The next prime is 97727671. The reversal of 97727647 is 74672779.

It is a weak prime.

It is an emirp because it is prime and its reverse (74672779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97727647 - 2³ = 97727639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97727647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97721647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48863823 + 48863824.

It is an arithmetic number, because the mean of its divisors is an integer number (48863824).

Almost surely, 2^97727647 is an apocalyptic number.

97727647 is a deficient number, since it is larger than the sum of its proper divisors (1).

97727647 is an equidigital number, since it uses as much as digits as its factorization.

97727647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1037232, while the sum is 49.

The square root of 97727647 is about 9885.7294622097. The cubic root of 97727647 is about 460.6161356116.

The spelling of 97727647 in words is "ninety-seven million, seven hundred twenty-seven thousand, six hundred forty-seven".