670739 has 2 divisors, whose sum is σ = 670740. Its totient is φ = 670738.

The previous prime is 670729. The next prime is 670763. The reversal of 670739 is 937076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670739 - 2¹² = 666643 is a prime.

It is a super-2 number, since 2×670739² = 899781612242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (670729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335369 + 335370.

It is an arithmetic number, because the mean of its divisors is an integer number (335370).

2⁶⁷⁰⁷³⁹ is an apocalyptic number.

670739 is a deficient number, since it is larger than the sum of its proper divisors (1).

670739 is an equidigital number, since it uses as much as digits as its factorization.

670739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 670739 is about 818.9865688764. The cubic root of 670739 is about 87.5355610558.

The spelling of 670739 in words is "six hundred seventy thousand, seven hundred thirty-nine".