83719371649 has 3 divisors (see below), whose sum is σ = 83719660993. Its totient is φ = 83719082306.

The previous prime is 83719371577. The next prime is 83719371679. The reversal of 83719371649 is 94617391738.

The square root of 83719371649 is 289343.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94617391738 = 2 ⋅47308695869.

It is not a de Polignac number, because 83719371649 - 2¹³ = 83719363457 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83719371593 and 83719371602.

It is not an unprimeable number, because it can be changed into a prime (83719371679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 144672 + ... + 434014.

Almost surely, 2^83719371649 is an apocalyptic number.

83719371649 is the 289343-rd square number.

83719371649 is the 144672-nd centered octagonal number.

It is an amenable number.

83719371649 is a deficient number, since it is larger than the sum of its proper divisors (289344).

83719371649 is an frugal number, since it uses more digits than its factorization.

83719371649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578686 (or 289343 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The spelling of 83719371649 in words is "eighty-three billion, seven hundred nineteen million, three hundred seventy-one thousand, six hundred forty-nine".