84040651693 has 2 divisors, whose sum is σ = 84040651694. Its totient is φ = 84040651692.

The previous prime is 84040651633. The next prime is 84040651697. The reversal of 84040651693 is 39615604048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58081964004 + 25958687689 = 241002^2 + 161117^2 .

It is a cyclic number.

It is not a de Polignac number, because 84040651693 - 2²⁵ = 84007097261 is a prime.

It is a super-2 number, since 2×84040651693² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84040651697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42020325846 + 42020325847.

It is an arithmetic number, because the mean of its divisors is an integer number (42020325847).

Almost surely, 2^84040651693 is an apocalyptic number.

It is an amenable number.

84040651693 is a deficient number, since it is larger than the sum of its proper divisors (1).

84040651693 is an equidigital number, since it uses as much as digits as its factorization.

84040651693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 84040651693 in words is "eighty-four billion, forty million, six hundred fifty-one thousand, six hundred ninety-three".