97555553 has 2 divisors, whose sum is σ = 97555554. Its totient is φ = 97555552.

The previous prime is 97555483. The next prime is 97555559. The reversal of 97555553 is 35555579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91833889 + 5721664 = 9583^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 97555553 - 2¹⁸ = 97293409 is a prime.

It is a super-3 number, since 3×97555553³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (97555559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48777776 + 48777777.

It is an arithmetic number, because the mean of its divisors is an integer number (48777777).

Almost surely, 2^97555553 is an apocalyptic number.

It is an amenable number.

97555553 is a deficient number, since it is larger than the sum of its proper divisors (1).

97555553 is an equidigital number, since it uses as much as digits as its factorization.

97555553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 590625, while the sum is 44.

The square root of 97555553 is about 9877.0214639840. The cubic root of 97555553 is about 460.3456019700.

The spelling of 97555553 in words is "ninety-seven million, five hundred fifty-five thousand, five hundred fifty-three".