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138946057 is a prime number
BaseRepresentation
bin10000100100000…
…10011000001001
3100200110012011021
420102002120021
5241032233212
621442032441
73305010355
oct1022023011
9320405137
10138946057
1171482258
123a648721
1322a2b703
141464c465
15c2e9307
hex8482609

138946057 has 2 divisors, whose sum is σ = 138946058. Its totient is φ = 138946056.

The previous prime is 138946037. The next prime is 138946081. The reversal of 138946057 is 750649831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124077321 + 14868736 = 11139^2 + 3856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-138946057 is a prime.

It is not a weakly prime, because it can be changed into another prime (138946037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69473028 + 69473029.

It is an arithmetic number, because the mean of its divisors is an integer number (69473029).

Almost surely, 2138946057 is an apocalyptic number.

It is an amenable number.

138946057 is a deficient number, since it is larger than the sum of its proper divisors (1).

138946057 is an equidigital number, since it uses as much as digits as its factorization.

138946057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 138946057 is about 11787.5382077854. The cubic root of 138946057 is about 517.9431284243.

The spelling of 138946057 in words is "one hundred thirty-eight million, nine hundred forty-six thousand, fifty-seven".