671199527 has 6 divisors (see below), whose sum is σ = 685661808. Its totient is φ = 656744852.

The previous prime is 671199523. The next prime is 671199533. The reversal of 671199527 is 725991176.

It is not a de Polignac number, because 671199527 - 2² = 671199523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671199523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175724 + ... + 179502.

It is an arithmetic number, because the mean of its divisors is an integer number (114276968).

Almost surely, 2^671199527 is an apocalyptic number.

671199527 is a deficient number, since it is larger than the sum of its proper divisors (14462281).

671199527 is an frugal number, since it uses more digits than its factorization.

671199527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 3826 counting only the distinct ones).

The product of its digits is 238140, while the sum is 47.

The square root of 671199527 is about 25907.5187349155. The cubic root of 671199527 is about 875.5559034027. Note that the first 3 decimals are identical.

Multiplying 671199527 by its sum of digits (47), we get a square (31546377769 = 177613²).

671199527 divided by its sum of digits (47) gives a square (14280841 = 3779²).

The spelling of 671199527 in words is "six hundred seventy-one million, one hundred ninety-nine thousand, five hundred twenty-seven".