187697473057 has 2 divisors, whose sum is σ = 187697473058. Its totient is φ = 187697473056.

The previous prime is 187697473021. The next prime is 187697473081. The reversal of 187697473057 is 750374796781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108103521681 + 79593951376 = 328791^2 + 282124^2 .

It is a cyclic number.

It is not a de Polignac number, because 187697473057 - 2⁷ = 187697472929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 187697473057.

It is not a weakly prime, because it can be changed into another prime (187697473357) 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, 93848736528 + 93848736529.

It is an arithmetic number, because the mean of its divisors is an integer number (93848736529).

Almost surely, 2^187697473057 is an apocalyptic number.

It is an amenable number.

187697473057 is a deficient number, since it is larger than the sum of its proper divisors (1).

187697473057 is an equidigital number, since it uses as much as digits as its factorization.

187697473057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62233920, while the sum is 64.

The spelling of 187697473057 in words is "one hundred eighty-seven billion, six hundred ninety-seven million, four hundred seventy-three thousand, fifty-seven".