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BaseRepresentation
bin10011000110010101
310222022101
4103012111
510000404
61402101
7444034
oct230625
9128271
1078229
1153858
1239331
13297b8
142071b
15182a4
hex13195

78229 has 2 divisors, whose sum is σ = 78230. Its totient is φ = 78228.

The previous prime is 78203. The next prime is 78233. The reversal of 78229 is 92287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72900 + 5329 = 270^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 78229 - 27 = 78101 is a prime.

It is a super-2 number, since 2×782292 = 12239552882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78197 and 78206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39114 + 39115.

It is an arithmetic number, because the mean of its divisors is an integer number (39115).

278229 is an apocalyptic number.

It is an amenable number.

78229 is a deficient number, since it is larger than the sum of its proper divisors (1).

78229 is an equidigital number, since it uses as much as digits as its factorization.

78229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 78229 is about 279.6944761700. The cubic root of 78229 is about 42.7683595890.

The spelling of 78229 in words is "seventy-eight thousand, two hundred twenty-nine".