670699 has 4 divisors (see below), whose sum is σ = 688864. Its totient is φ = 652536.

The previous prime is 670693. The next prime is 670711. The reversal of 670699 is 996076.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 18127 = 670699 / (6 + 7 + 0 + 6 + 9 + 9).

It is a Duffinian number.

670699 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (670693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9027 + ... + 9100.

It is an arithmetic number, because the mean of its divisors is an integer number (172216).

2⁶⁷⁰⁶⁹⁹ is an apocalyptic number.

670699 is a deficient number, since it is larger than the sum of its proper divisors (18165).

670699 is a wasteful number, since it uses less digits than its factorization.

670699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18164.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 670699 is about 818.9621480874. The cubic root of 670699 is about 87.5338209393.

It can be divided in two parts, 670 and 699, that added together give a square (1369 = 37²).

The spelling of 670699 in words is "six hundred seventy thousand, six hundred ninety-nine".