671998053 has 8 divisors (see below), whose sum is σ = 896336416. Its totient is φ = 447829200.

The previous prime is 671998039. The next prime is 671998073. The reversal of 671998053 is 350899176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671998053 - 2⁴ = 671998037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 671997993 and 671998011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671998013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32818 + ... + 49203.

It is an arithmetic number, because the mean of its divisors is an integer number (112042052).

Almost surely, 2^671998053 is an apocalyptic number.

It is an amenable number.

671998053 is a deficient number, since it is larger than the sum of its proper divisors (224338363).

671998053 is a wasteful number, since it uses less digits than its factorization.

671998053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84755.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 671998053 is about 25922.9252400264. The cubic root of 671998053 is about 875.9029820518.

The spelling of 671998053 in words is "six hundred seventy-one million, nine hundred ninety-eight thousand, fifty-three".