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670717 = 4331549
BaseRepresentation
bin10100011101111111101
31021002001101
42203233331
5132430332
622213101
75462305
oct2435775
91232041
10670717
11418a13
12284191
131a6398
14136605
15d3ae7
hexa3bfd

670717 has 4 divisors (see below), whose sum is σ = 672700. Its totient is φ = 668736.

The previous prime is 670711. The next prime is 670727. The reversal of 670717 is 717076.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143641 + 527076 = 379^2 + 726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-670717 is a prime.

It is a super-2 number, since 2×6707172 = 899722588178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670711) 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, 342 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (168175).

2670717 is an apocalyptic number.

It is an amenable number.

670717 is a deficient number, since it is larger than the sum of its proper divisors (1983).

670717 is a wasteful number, since it uses less digits than its factorization.

670717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 670717 is about 818.9731375326. The cubic root of 670717 is about 87.5346040003.

It can be divided in two parts, 6707 and 17, that added together give a square (6724 = 822).

The spelling of 670717 in words is "six hundred seventy thousand, seven hundred seventeen".

Divisors: 1 433 1549 670717