97121747 has 2 divisors, whose sum is σ = 97121748. Its totient is φ = 97121746.

The previous prime is 97121737. The next prime is 97121771. The reversal of 97121747 is 74712179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97121747 - 2¹⁸ = 96859603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97121747.

It is not a weakly prime, because it can be changed into another prime (97121737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48560873 + 48560874.

It is an arithmetic number, because the mean of its divisors is an integer number (48560874).

Almost surely, 2^97121747 is an apocalyptic number.

97121747 is a deficient number, since it is larger than the sum of its proper divisors (1).

97121747 is an equidigital number, since it uses as much as digits as its factorization.

97121747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 38.

The square root of 97121747 is about 9855.0366310836. The cubic root of 97121747 is about 459.6622394536.

The spelling of 97121747 in words is "ninety-seven million, one hundred twenty-one thousand, seven hundred forty-seven".