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2049309 = 321092089
BaseRepresentation
bin111110100010100011101
310212010010100
413310110131
51011034214
6111531313
723263443
oct7642435
93763110
102049309
11117a749
12829b39
13569a12
143b4b93
152a7309
hex1f451d

2049309 has 12 divisors (see below), whose sum is σ = 2988700. Its totient is φ = 1353024.

The previous prime is 2049301. The next prime is 2049331. The reversal of 2049309 is 9039402.

It can be written as a sum of positive squares in 2 ways, for example, as 1633284 + 416025 = 1278^2 + 645^2 .

It is not a de Polignac number, because 2049309 - 23 = 2049301 is a prime.

It is a Duffinian number.

2049309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64 + ... + 2025.

22049309 is an apocalyptic number.

It is an amenable number.

2049309 is a deficient number, since it is larger than the sum of its proper divisors (939391).

2049309 is a wasteful number, since it uses less digits than its factorization.

2049309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2201 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2049309 is about 1431.5407783224. The cubic root of 2049309 is about 127.0191344886.

The spelling of 2049309 in words is "two million, forty-nine thousand, three hundred nine".

Divisors: 1 3 9 109 327 981 2089 6267 18801 227701 683103 2049309