83784634069 has 2 divisors, whose sum is σ = 83784634070. Its totient is φ = 83784634068.

The previous prime is 83784634057. The next prime is 83784634091. The reversal of 83784634069 is 96043648738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42822921969 + 40961712100 = 206937^2 + 202390^2 .

It is a cyclic number.

It is not a de Polignac number, because 83784634069 - 2⁷ = 83784633941 is a prime.

It is a super-2 number, since 2×83784634069² (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 (83784634009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41892317034 + 41892317035.

It is an arithmetic number, because the mean of its divisors is an integer number (41892317035).

Almost surely, 2^83784634069 is an apocalyptic number.

It is an amenable number.

83784634069 is a deficient number, since it is larger than the sum of its proper divisors (1).

83784634069 is an equidigital number, since it uses as much as digits as its factorization.

83784634069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 58.

The spelling of 83784634069 in words is "eighty-three billion, seven hundred eighty-four million, six hundred thirty-four thousand, sixty-nine".