672739 has 4 divisors (see below), whose sum is σ = 674656. Its totient is φ = 670824.

The previous prime is 672703. The next prime is 672743. The reversal of 672739 is 937276.

672739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 672739 - 2⁹ = 672227 is a prime.

It is a super-3 number, since 3×672739³ = 913400133334558257, which contains 333 as substring.

It is a Duffinian number.

672739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (672779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264 + ... + 1189.

It is an arithmetic number, because the mean of its divisors is an integer number (168664).

2⁶⁷²⁷³⁹ is an apocalyptic number.

672739 is a deficient number, since it is larger than the sum of its proper divisors (1917).

672739 is a wasteful number, since it uses less digits than its factorization.

672739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its digits is 15876, while the sum is 34.

The square root of 672739 is about 820.2066812700. The cubic root of 672739 is about 87.6224788194.

The spelling of 672739 in words is "six hundred seventy-two thousand, seven hundred thirty-nine".