671021741 has 4 divisors (see below), whose sum is σ = 722638812. Its totient is φ = 619404672.

The previous prime is 671021737. The next prime is 671021759. The reversal of 671021741 is 147120176.

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

It can be written as a sum of positive squares in 2 ways, for example, as 202948516 + 468073225 = 14246^2 + 21635^2 .

It is a cyclic number.

It is not a de Polignac number, because 671021741 - 2² = 671021737 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 (671021731) 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, 25808516 + ... + 25808541.

It is an arithmetic number, because the mean of its divisors is an integer number (180659703).

Almost surely, 2^671021741 is an apocalyptic number.

It is an amenable number.

671021741 is a deficient number, since it is larger than the sum of its proper divisors (51617071).

671021741 is a wasteful number, since it uses less digits than its factorization.

671021741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51617070.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 671021741 is about 25904.0873415760. The cubic root of 671021741 is about 875.4785914056.

The spelling of 671021741 in words is "six hundred seventy-one million, twenty-one thousand, seven hundred forty-one".