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138794569 is a prime number
BaseRepresentation
bin10000100010111…
…01011001001001
3100200011111100121
420101131121021
5241012411234
621434503241
73303506614
oct1021353111
9320144317
10138794569
1171389461
123a594b21
13229a7784
141460d17b
15c2b94b4
hex845d649

138794569 has 2 divisors, whose sum is σ = 138794570. Its totient is φ = 138794568.

The previous prime is 138794567. The next prime is 138794603. The reversal of 138794569 is 965497831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102252544 + 36542025 = 10112^2 + 6045^2 .

It is a cyclic number.

It is not a de Polignac number, because 138794569 - 21 = 138794567 is a prime.

It is a super-2 number, since 2×1387945692 = 38527864767791522, which contains 22 as substring.

Together with 138794567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (138794567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69397284 + 69397285.

It is an arithmetic number, because the mean of its divisors is an integer number (69397285).

Almost surely, 2138794569 is an apocalyptic number.

It is an amenable number.

138794569 is a deficient number, since it is larger than the sum of its proper divisors (1).

138794569 is an equidigital number, since it uses as much as digits as its factorization.

138794569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 138794569 is about 11781.1106861790. The cubic root of 138794569 is about 517.7548282488.

The spelling of 138794569 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, five hundred sixty-nine".