670749 has 8 divisors (see below), whose sum is σ = 933312. Its totient is φ = 427680.

The previous prime is 670739. The next prime is 670763. The reversal of 670749 is 947076.

670749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 670749 - 2⁸ = 670493 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4792 + ... + 4929.

It is an arithmetic number, because the mean of its divisors is an integer number (116664).

2⁶⁷⁰⁷⁴⁹ is an apocalyptic number.

670749 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

670749 is a deficient number, since it is larger than the sum of its proper divisors (262563).

670749 is a wasteful number, since it uses less digits than its factorization.

670749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 670749 is about 818.9926739599. The cubic root of 670749 is about 87.5359960741.

The spelling of 670749 in words is "six hundred seventy thousand, seven hundred forty-nine".