671935121 has 16 divisors (see below), whose sum is σ = 790419840. Its totient is φ = 563137920.

The previous prime is 671935111. The next prime is 671935127. The reversal of 671935121 is 121539176.

It is a cyclic number.

It is not a de Polignac number, because 671935121 - 2²² = 667740817 is a prime.

It is a super-3 number, since 3×671935121³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671935127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128861 + ... + 133973.

It is an arithmetic number, because the mean of its divisors is an integer number (49401240).

Almost surely, 2^671935121 is an apocalyptic number.

It is an amenable number.

671935121 is a deficient number, since it is larger than the sum of its proper divisors (118484719).

671935121 is a wasteful number, since it uses less digits than its factorization.

671935121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056.

The product of its digits is 11340, while the sum is 35.

The square root of 671935121 is about 25921.7113825457. The cubic root of 671935121 is about 875.8756386951.

The spelling of 671935121 in words is "six hundred seventy-one million, nine hundred thirty-five thousand, one hundred twenty-one".