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47909423 = 369712959
BaseRepresentation
bin1011011011000…
…0101000101111
310100011001101002
42312300220233
544231100143
64430510515
71121136422
oct266605057
9110131332
1047909423
1125053071
121406543b
139c05993
1465119b9
1543155b8
hex2db0a2f

47909423 has 4 divisors (see below), whose sum is σ = 47926080. Its totient is φ = 47892768.

The previous prime is 47909399. The next prime is 47909447. The reversal of 47909423 is 32490974.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32490974 = 216245487.

It is an interprime number because it is at equal distance from previous prime (47909399) and next prime (47909447).

It is a cyclic number.

It is not a de Polignac number, because 47909423 - 26 = 47909359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47909453) 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, 2783 + ... + 10176.

It is an arithmetic number, because the mean of its divisors is an integer number (11981520).

Almost surely, 247909423 is an apocalyptic number.

47909423 is a deficient number, since it is larger than the sum of its proper divisors (16657).

47909423 is a wasteful number, since it uses less digits than its factorization.

47909423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16656.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 47909423 is about 6921.6633116614. The cubic root of 47909423 is about 363.1953783325.

The spelling of 47909423 in words is "forty-seven million, nine hundred nine thousand, four hundred twenty-three".

Divisors: 1 3697 12959 47909423