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1664617 = 971312
BaseRepresentation
bin110010110011001101001
310010120102111
412112121221
5411231432
655402321
720102053
oct6263151
93116374
101664617
11a37719
126833a1
134638a6
143148d3
1522d347
hex196669

1664617 has 6 divisors (see below), whose sum is σ = 1694714. Its totient is φ = 1634880.

The previous prime is 1664569. The next prime is 1664627. The reversal of 1664617 is 7164661.

It can be written as a sum of positive squares in only one way, i.e., 1390041 + 274576 = 1179^2 + 524^2 .

It is a de Polignac number, because none of the positive numbers 2k-1664617 is a prime.

It is a Duffinian number.

1664617 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1664627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12642 + ... + 12772.

21664617 is an apocalyptic number.

It is an amenable number.

1664617 is a deficient number, since it is larger than the sum of its proper divisors (30097).

1664617 is an frugal number, since it uses more digits than its factorization.

1664617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 228 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 1664617 is about 1290.2003720353. The cubic root of 1664617 is about 118.5144872411.

The spelling of 1664617 in words is "one million, six hundred sixty-four thousand, six hundred seventeen".

Divisors: 1 97 131 12707 17161 1664617