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139384481 is a prime number
BaseRepresentation
bin10000100111011…
…01011010100001
3100201021110120012
420103231122201
5241140300411
621455254305
73311514515
oct1023553241
9321243505
10139384481
1171751695
123a81a395
1322b53132
1414724145
15c38418b
hex84ed6a1

139384481 has 2 divisors, whose sum is σ = 139384482. Its totient is φ = 139384480.

The previous prime is 139384471. The next prime is 139384489. The reversal of 139384481 is 184483931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 2611456 = 11695^2 + 1616^2 .

It is an emirp because it is prime and its reverse (184483931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-139384481 is a prime.

It is a super-2 number, since 2×1393844812 = 38856067087278722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139384489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69692240 + 69692241.

It is an arithmetic number, because the mean of its divisors is an integer number (69692241).

Almost surely, 2139384481 is an apocalyptic number.

It is an amenable number.

139384481 is a deficient number, since it is larger than the sum of its proper divisors (1).

139384481 is an equidigital number, since it uses as much as digits as its factorization.

139384481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 139384481 is about 11806.1204889667. The cubic root of 139384481 is about 518.4873210962.

The spelling of 139384481 in words is "one hundred thirty-nine million, three hundred eighty-four thousand, four hundred eighty-one".