671347111 has 4 divisors (see below), whose sum is σ = 671868424. Its totient is φ = 670825800.

The previous prime is 671347093. The next prime is 671347123. The reversal of 671347111 is 111743176.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671347111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671344111) 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, 258720 + ... + 261301.

It is an arithmetic number, because the mean of its divisors is an integer number (167967106).

Almost surely, 2^671347111 is an apocalyptic number.

671347111 is a deficient number, since it is larger than the sum of its proper divisors (521313).

671347111 is a wasteful number, since it uses less digits than its factorization.

671347111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521312.

The product of its digits is 3528, while the sum is 31.

The square root of 671347111 is about 25910.3668634776. The cubic root of 671347111 is about 875.6200713923.

It can be divided in two parts, 6713 and 47111, that added together give a square (53824 = 232²).

The spelling of 671347111 in words is "six hundred seventy-one million, three hundred forty-seven thousand, one hundred eleven".