671530711 has 4 divisors (see below), whose sum is σ = 693193024. Its totient is φ = 649868400.

The previous prime is 671530703. The next prime is 671530729. The reversal of 671530711 is 117035176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671530711 - 2³ = 671530703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 21662281 = 671530711 / (6 + 7 + 1 + 5 + 3 + 0 + 7 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671530751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10831110 + ... + 10831171.

It is an arithmetic number, because the mean of its divisors is an integer number (173298256).

Almost surely, 2^671530711 is an apocalyptic number.

671530711 is a deficient number, since it is larger than the sum of its proper divisors (21662313).

671530711 is a wasteful number, since it uses less digits than its factorization.

671530711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21662312.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 671530711 is about 25913.9096046891. The cubic root of 671530711 is about 875.6998856391.

Adding to 671530711 its reverse (117035176), we get a palindrome (788565887).

The spelling of 671530711 in words is "six hundred seventy-one million, five hundred thirty thousand, seven hundred eleven".