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2066409 = 32229601
BaseRepresentation
bin111111000011111101001
310212222120200
413320133221
51012111114
6112142413
723364342
oct7703751
93788520
102066409
111191584
12837a09
13574737
143bb0c9
152ac409
hex1f87e9

2066409 has 6 divisors (see below), whose sum is σ = 2984826. Its totient is φ = 1377600.

The previous prime is 2066399. The next prime is 2066419. The reversal of 2066409 is 9046602.

It is an interprime number because it is at equal distance from previous prime (2066399) and next prime (2066419).

It can be written as a sum of positive squares in only one way, i.e., 2039184 + 27225 = 1428^2 + 165^2 .

It is not a de Polignac number, because 2066409 - 28 = 2066153 is a prime.

It is an Ulam number.

2066409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2066419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114792 + ... + 114809.

It is an arithmetic number, because the mean of its divisors is an integer number (497471).

22066409 is an apocalyptic number.

It is an amenable number.

2066409 is a deficient number, since it is larger than the sum of its proper divisors (918417).

2066409 is a wasteful number, since it uses less digits than its factorization.

2066409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229607 (or 229604 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2066409 is about 1437.5009565214. The cubic root of 2066409 is about 127.3714505976.

The spelling of 2066409 in words is "two million, sixty-six thousand, four hundred nine".

Divisors: 1 3 9 229601 688803 2066409