671392905 has 8 divisors (see below), whose sum is σ = 1074228672. Its totient is φ = 358076208.

The previous prime is 671392871. The next prime is 671392921. The reversal of 671392905 is 509293176.

671392905 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 671392905 - 2¹⁴ = 671376521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22379749 + ... + 22379778.

It is an arithmetic number, because the mean of its divisors is an integer number (134278584).

Almost surely, 2^671392905 is an apocalyptic number.

It is an amenable number.

671392905 is a deficient number, since it is larger than the sum of its proper divisors (402835767).

671392905 is a wasteful number, since it uses less digits than its factorization.

671392905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44759535.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 671392905 is about 25911.2505487481. The cubic root of 671392905 is about 875.6399802359.

The spelling of 671392905 in words is "six hundred seventy-one million, three hundred ninety-two thousand, nine hundred five".