84419950409089 has 3 divisors (see below), whose sum is σ = 84419959597123. Its totient is φ = 84419941221056.

The previous prime is 84419950409051. The next prime is 84419950409191. The reversal of 84419950409089 is 98090405991448.

The square root of 84419950409089 is 9188033.

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.

It can be written as a sum of positive squares in only one way, i.e., 15927641993025 + 68492308416064 = 3990945^2 + 8276008^2 .

It is not a de Polignac number, because 84419950409089 - 2¹¹ = 84419950407041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84419950409989) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4594017 + ... + 13782049.

Almost surely, 2^{84419950409089} is an apocalyptic number.

84419950409089 is the 9188033-rd square number.

84419950409089 is the 4594017-th centered octagonal number.

It is an amenable number.

84419950409089 is a deficient number, since it is larger than the sum of its proper divisors (9188034).

84419950409089 is an frugal number, since it uses more digits than its factorization.

84419950409089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18376066 (or 9188033 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 70.

The spelling of 84419950409089 in words is "eighty-four trillion, four hundred nineteen billion, nine hundred fifty million, four hundred nine thousand, eighty-nine".