84297839177 has 2 divisors, whose sum is σ = 84297839178. Its totient is φ = 84297839176.

The previous prime is 84297839141. The next prime is 84297839203. The reversal of 84297839177 is 77193879248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83738469376 + 559369801 = 289376^2 + 23651^2 .

It is a cyclic number.

It is not a de Polignac number, because 84297839177 - 2¹⁴ = 84297822793 is a prime.

It is a super-2 number, since 2×84297839177² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84297839107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42148919588 + 42148919589.

It is an arithmetic number, because the mean of its divisors is an integer number (42148919589).

Almost surely, 2^84297839177 is an apocalyptic number.

It is an amenable number.

84297839177 is a deficient number, since it is larger than the sum of its proper divisors (1).

84297839177 is an equidigital number, since it uses as much as digits as its factorization.

84297839177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 65.

The spelling of 84297839177 in words is "eighty-four billion, two hundred ninety-seven million, eight hundred thirty-nine thousand, one hundred seventy-seven".