671730073 has 6 divisors (see below), whose sum is σ = 781400346. Its totient is φ = 575768592.

The previous prime is 671730023. The next prime is 671730089. The reversal of 671730073 is 370037176.

It can be written as a sum of positive squares in only one way, i.e., 435431689 + 236298384 = 20867^2 + 15372^2 .

It is not a de Polignac number, because 671730073 - 2¹³ = 671721881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671730023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6854340 + ... + 6854437.

It is an arithmetic number, because the mean of its divisors is an integer number (130233391).

Almost surely, 2^671730073 is an apocalyptic number.

It is an amenable number.

671730073 is a deficient number, since it is larger than the sum of its proper divisors (109670273).

671730073 is a wasteful number, since it uses less digits than its factorization.

671730073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13708791 (or 13708784 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 34.

The square root of 671730073 is about 25917.7559406674. The cubic root of 671730073 is about 875.7865354400.

The spelling of 671730073 in words is "six hundred seventy-one million, seven hundred thirty thousand, seventy-three".