672115391 has 8 divisors (see below), whose sum is σ = 685394304. Its totient is φ = 658932120.

The previous prime is 672115387. The next prime is 672115393. The reversal of 672115391 is 193511276.

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

It is a cyclic number.

It is not a de Polignac number, because 672115391 - 2² = 672115387 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672115393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9635 + ... + 37908.

It is an arithmetic number, because the mean of its divisors is an integer number (85674288).

Almost surely, 2^672115391 is an apocalyptic number.

672115391 is a deficient number, since it is larger than the sum of its proper divisors (13278913).

672115391 is a wasteful number, since it uses less digits than its factorization.

672115391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47821.

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

The square root of 672115391 is about 25925.1883503283. The cubic root of 672115391 is about 875.9539597405.

The spelling of 672115391 in words is "six hundred seventy-two million, one hundred fifteen thousand, three hundred ninety-one".