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139384471 is a prime number
BaseRepresentation
bin10000100111011…
…01011010010111
3100201021110112211
420103231122113
5241140300341
621455254251
73311514502
oct1023553227
9321243484
10139384471
1171751686
123a81a387
1322b53125
1414724139
15c384181
hex84ed697

139384471 has 2 divisors, whose sum is σ = 139384472. Its totient is φ = 139384470.

The previous prime is 139384433. The next prime is 139384481. The reversal of 139384471 is 174483931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139384471 - 217 = 139253399 is a prime.

It is a super-3 number, since 3×1393844713 (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139384481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69692235 + 69692236.

It is an arithmetic number, because the mean of its divisors is an integer number (69692236).

Almost surely, 2139384471 is an apocalyptic number.

139384471 is a deficient number, since it is larger than the sum of its proper divisors (1).

139384471 is an equidigital number, since it uses as much as digits as its factorization.

139384471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 139384471 is about 11806.1200654576. The cubic root of 139384471 is about 518.4873086968.

The spelling of 139384471 in words is "one hundred thirty-nine million, three hundred eighty-four thousand, four hundred seventy-one".