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50309 = 77187
BaseRepresentation
bin1100010010000101
32120000022
430102011
53102214
61024525
7266450
oct142205
976008
1050309
1134886
1225145
1319b8c
1414497
15ed8e
hexc485

50309 has 4 divisors (see below), whose sum is σ = 57504. Its totient is φ = 43116.

The previous prime is 50291. The next prime is 50311. The reversal of 50309 is 90305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90305 = 518061.

It is a cyclic number.

It is not a de Polignac number, because 50309 - 28 = 50053 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50329) 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, 3587 + ... + 3600.

It is an arithmetic number, because the mean of its divisors is an integer number (14376).

250309 is an apocalyptic number.

It is an amenable number.

50309 is a deficient number, since it is larger than the sum of its proper divisors (7195).

50309 is an equidigital number, since it uses as much as digits as its factorization.

50309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 50309 is about 224.2966785309. The cubic root of 50309 is about 36.9160502343.

The spelling of 50309 in words is "fifty thousand, three hundred nine".

Divisors: 1 7 7187 50309