671955123 has 8 divisors (see below), whose sum is σ = 1023931648. Its totient is φ = 383974344.

The previous prime is 671955103. The next prime is 671955139. The reversal of 671955123 is 321559176.

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

It is not a de Polignac number, because 671955123 - 2⁹ = 671954611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671955103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15998911 + ... + 15998952.

It is an arithmetic number, because the mean of its divisors is an integer number (127991456).

Almost surely, 2^671955123 is an apocalyptic number.

671955123 is a deficient number, since it is larger than the sum of its proper divisors (351976525).

671955123 is a wasteful number, since it uses less digits than its factorization.

671955123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31997873.

The product of its digits is 56700, while the sum is 39.

The square root of 671955123 is about 25922.0971952502. The cubic root of 671955123 is about 875.8843295594.

The spelling of 671955123 in words is "six hundred seventy-one million, nine hundred fifty-five thousand, one hundred twenty-three".