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139338917 is a prime number
BaseRepresentation
bin10000100111000…
…10010010100101
3100201012011001122
420103202102211
5241132321132
621454303325
73311234624
oct1023422245
9321164048
10139338917
1171720433
123a7b7b45
1322b38483
14147116bb
15c375912
hex84e24a5

139338917 has 2 divisors, whose sum is σ = 139338918. Its totient is φ = 139338916.

The previous prime is 139338907. The next prime is 139338937. The reversal of 139338917 is 719833931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115971361 + 23367556 = 10769^2 + 4834^2 .

It is an emirp because it is prime and its reverse (719833931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-139338917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139338907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69669458 + 69669459.

It is an arithmetic number, because the mean of its divisors is an integer number (69669459).

Almost surely, 2139338917 is an apocalyptic number.

It is an amenable number.

139338917 is a deficient number, since it is larger than the sum of its proper divisors (1).

139338917 is an equidigital number, since it uses as much as digits as its factorization.

139338917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 139338917 is about 11804.1906541702. The cubic root of 139338917 is about 518.4308180795.

The spelling of 139338917 in words is "one hundred thirty-nine million, three hundred thirty-eight thousand, nine hundred seventeen".