84394317049 has 27 divisors (see below), whose sum is σ = 100419935877. Its totient is φ = 70718700024.

The previous prime is 84394317043. The next prime is 84394317071. The reversal of 84394317049 is 94071349348.

The square root of 84394317049 is 290507.

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

It is not a de Polignac number, because 84394317049 - 2¹¹ = 84394315001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84394316987 and 84394317005.

It is not an unprimeable number, because it can be changed into a prime (84394317043) 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 in 26 ways as a sum of consecutive naturals, for example, 95576362 + ... + 95577244.

Almost surely, 2^84394317049 is an apocalyptic number.

84394317049 is the 290507-th square number.

84394317049 is the 145254-th centered octagonal number.

It is an amenable number.

84394317049 is a deficient number, since it is larger than the sum of its proper divisors (16025618828).

84394317049 is an frugal number, since it uses more digits than its factorization.

84394317049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 84394317049 in words is "eighty-four billion, three hundred ninety-four million, three hundred seventeen thousand, forty-nine".