97188251669 has 2 divisors, whose sum is σ = 97188251670. Its totient is φ = 97188251668.

The previous prime is 97188251659. The next prime is 97188251701. The reversal of 97188251669 is 96615288179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67996820644 + 29191431025 = 260762^2 + 170855^2 .

It is an emirp because it is prime and its reverse (96615288179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97188251669 - 2¹² = 97188247573 is a prime.

It is a super-2 number, since 2×97188251669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97188251639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48594125834 + 48594125835.

It is an arithmetic number, because the mean of its divisors is an integer number (48594125835).

Almost surely, 2^97188251669 is an apocalyptic number.

It is an amenable number.

97188251669 is a deficient number, since it is larger than the sum of its proper divisors (1).

97188251669 is an equidigital number, since it uses as much as digits as its factorization.

97188251669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 62.

The spelling of 97188251669 in words is "ninety-seven billion, one hundred eighty-eight million, two hundred fifty-one thousand, six hundred sixty-nine".