84145577 has 2 divisors, whose sum is σ = 84145578. Its totient is φ = 84145576.

The previous prime is 84145543. The next prime is 84145583. The reversal of 84145577 is 77554148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58125376 + 26020201 = 7624^2 + 5101^2 .

It is a cyclic number.

It is not a de Polignac number, because 84145577 - 2¹⁰ = 84144553 is a prime.

It is not a weakly prime, because it can be changed into another prime (84145177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42072788 + 42072789.

It is an arithmetic number, because the mean of its divisors is an integer number (42072789).

Almost surely, 2^84145577 is an apocalyptic number.

It is an amenable number.

84145577 is a deficient number, since it is larger than the sum of its proper divisors (1).

84145577 is an equidigital number, since it uses as much as digits as its factorization.

84145577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 41.

The square root of 84145577 is about 9173.0898284057. The cubic root of 84145577 is about 438.2047668871.

The spelling of 84145577 in words is "eighty-four million, one hundred forty-five thousand, five hundred seventy-seven".