672857247 has 8 divisors (see below), whose sum is σ = 921390256. Its totient is φ = 436447872.

The previous prime is 672857209. The next prime is 672857261. The reversal of 672857247 is 742758276.

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

It is not a de Polignac number, because 672857247 - 2¹¹ = 672855199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672857196 and 672857205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672857287) 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, 3030778 + ... + 3030999.

It is an arithmetic number, because the mean of its divisors is an integer number (115173782).

Almost surely, 2^672857247 is an apocalyptic number.

672857247 is a deficient number, since it is larger than the sum of its proper divisors (248533009).

672857247 is a wasteful number, since it uses less digits than its factorization.

672857247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061817.

The product of its digits is 1317120, while the sum is 48.

The square root of 672857247 is about 25939.4920343479. The cubic root of 672857247 is about 876.2761230522.

The spelling of 672857247 in words is "six hundred seventy-two million, eight hundred fifty-seven thousand, two hundred forty-seven".