673986815089 has 9 divisors (see below), whose sum is σ = 784032163851. Its totient is φ = 577698058560.

The previous prime is 673986815023. The next prime is 673986815113. The reversal of 673986815089 is 980518689376.

The square root of 673986815089 is 820967.

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

It can be written as a sum of positive squares in only one way, i.e., 635899389489 + 38087425600 = 797433^2 + 195160^2 .

It is not a de Polignac number, because 673986815089 - 2¹¹ = 673986813041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673986812089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5688129 + ... + 5805409.

Almost surely, 2^673986815089 is an apocalyptic number.

673986815089 is the 820967-th square number.

673986815089 is the 410484-th centered octagonal number.

It is an amenable number.

673986815089 is a deficient number, since it is larger than the sum of its proper divisors (110045348762).

673986815089 is an frugal number, since it uses more digits than its factorization.

673986815089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234576 (or 117288 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 673986815089 in words is "six hundred seventy-three billion, nine hundred eighty-six million, eight hundred fifteen thousand, eighty-nine".