84977769137 has 2 divisors, whose sum is σ = 84977769138. Its totient is φ = 84977769136.

The previous prime is 84977769109. The next prime is 84977769179. The reversal of 84977769137 is 73196777948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66989862976 + 17987906161 = 258824^2 + 134119^2 .

It is a cyclic number.

It is not a de Polignac number, because 84977769137 - 2⁶ = 84977769073 is a prime.

It is not a weakly prime, because it can be changed into another prime (84977769637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42488884568 + 42488884569.

It is an arithmetic number, because the mean of its divisors is an integer number (42488884569).

Almost surely, 2^84977769137 is an apocalyptic number.

It is an amenable number.

84977769137 is a deficient number, since it is larger than the sum of its proper divisors (1).

84977769137 is an equidigital number, since it uses as much as digits as its factorization.

84977769137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112021056, while the sum is 68.

The spelling of 84977769137 in words is "eighty-four billion, nine hundred seventy-seven million, seven hundred sixty-nine thousand, one hundred thirty-seven".