671344537 has 8 divisors (see below), whose sum is σ = 723915360. Its totient is φ = 620497440.

The previous prime is 671344523. The next prime is 671344549. The reversal of 671344537 is 735443176.

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

It is not a de Polignac number, because 671344537 - 2²⁷ = 537126809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671344537.

It is not an unprimeable number, because it can be changed into a prime (671342537) 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, 430123 + ... + 431680.

It is an arithmetic number, because the mean of its divisors is an integer number (90489420).

Almost surely, 2^671344537 is an apocalyptic number.

It is an amenable number.

671344537 is a deficient number, since it is larger than the sum of its proper divisors (52570823).

671344537 is a wasteful number, since it uses less digits than its factorization.

671344537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861863.

The product of its digits is 211680, while the sum is 40.

The square root of 671344537 is about 25910.3171921920. The cubic root of 671344537 is about 875.6189523244.

The spelling of 671344537 in words is "six hundred seventy-one million, three hundred forty-four thousand, five hundred thirty-seven".