672747 has 8 divisors (see below), whose sum is σ = 910656. Its totient is φ = 441672.

The previous prime is 672743. The next prime is 672757. The reversal of 672747 is 747276.

It is a happy number.

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

It is not a de Polignac number, because 672747 - 2² = 672743 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

672747 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (672743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1473 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (113832).

2⁶⁷²⁷⁴⁷ is an apocalyptic number.

672747 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

672747 is a deficient number, since it is larger than the sum of its proper divisors (237909).

672747 is a wasteful number, since it uses less digits than its factorization.

672747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417.

The product of its digits is 16464, while the sum is 33.

The square root of 672747 is about 820.2115580751. The cubic root of 672747 is about 87.6228261444.

Subtracting 672747 from its reverse (747276), we obtain a square (74529 = 273²).

The spelling of 672747 in words is "six hundred seventy-two thousand, seven hundred forty-seven".