671434537 has 4 divisors (see below), whose sum is σ = 681456016. Its totient is φ = 661413060.

The previous prime is 671434513. The next prime is 671434571. The reversal of 671434537 is 735434176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671434537 - 2¹⁹ = 670910249 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 671434537.

It is not an unprimeable number, because it can be changed into a prime (671434507) 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 3 ways as a sum of consecutive naturals, for example, 5010639 + ... + 5010772.

It is an arithmetic number, because the mean of its divisors is an integer number (170364004).

Almost surely, 2^671434537 is an apocalyptic number.

671434537 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

671434537 is a deficient number, since it is larger than the sum of its proper divisors (10021479).

671434537 is a wasteful number, since it uses less digits than its factorization.

671434537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021478.

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

The square root of 671434537 is about 25912.0538938927. The cubic root of 671434537 is about 875.6580788733.

The spelling of 671434537 in words is "six hundred seventy-one million, four hundred thirty-four thousand, five hundred thirty-seven".