672643 has 2 divisors, whose sum is σ = 672644. Its totient is φ = 672642.

The previous prime is 672641. The next prime is 672653. The reversal of 672643 is 346276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672643 - 2¹ = 672641 is a prime.

Together with 672641, it forms a pair of twin primes.

672643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (672641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336321 + 336322.

It is an arithmetic number, because the mean of its divisors is an integer number (336322).

2⁶⁷²⁶⁴³ is an apocalyptic number.

672643 is a deficient number, since it is larger than the sum of its proper divisors (1).

672643 is an equidigital number, since it uses as much as digits as its factorization.

672643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 672643 is about 820.1481573472. The cubic root of 672643 is about 87.6183107057.

The spelling of 672643 in words is "six hundred seventy-two thousand, six hundred forty-three".