65947188973 has 2 divisors, whose sum is σ = 65947188974. Its totient is φ = 65947188972.

The previous prime is 65947188907. The next prime is 65947188997. The reversal of 65947188973 is 37988174956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62051806404 + 3895382569 = 249102^2 + 62413^2 .

It is a cyclic number.

It is not a de Polignac number, because 65947188973 - 2²⁵ = 65913634541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65947188899 and 65947188908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65947188473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32973594486 + 32973594487.

It is an arithmetic number, because the mean of its divisors is an integer number (32973594487).

Almost surely, 2^65947188973 is an apocalyptic number.

It is an amenable number.

65947188973 is a deficient number, since it is larger than the sum of its proper divisors (1).

65947188973 is an equidigital number, since it uses as much as digits as its factorization.

65947188973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91445760, while the sum is 67.

The spelling of 65947188973 in words is "sixty-five billion, nine hundred forty-seven million, one hundred eighty-eight thousand, nine hundred seventy-three".