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399490229 is a prime number
BaseRepresentation
bin10111110011111…
…011110010110101
31000211201012120102
4113303323302311
51304232141404
6103350243445
712620416355
oct2763736265
91024635512
10399490229
11195557a16
12b1956585
13649c3568
143b0b0b65
152511271e
hex17cfbcb5

399490229 has 2 divisors, whose sum is σ = 399490230. Its totient is φ = 399490228.

The previous prime is 399490213. The next prime is 399490279. The reversal of 399490229 is 922094993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274564900 + 124925329 = 16570^2 + 11177^2 .

It is a cyclic number.

It is not a de Polignac number, because 399490229 - 24 = 399490213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399490279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199745114 + 199745115.

It is an arithmetic number, because the mean of its divisors is an integer number (199745115).

Almost surely, 2399490229 is an apocalyptic number.

It is an amenable number.

399490229 is a deficient number, since it is larger than the sum of its proper divisors (1).

399490229 is an equidigital number, since it uses as much as digits as its factorization.

399490229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 399490229 is about 19987.2516619970. The cubic root of 399490229 is about 736.4931645975.

The spelling of 399490229 in words is "three hundred ninety-nine million, four hundred ninety thousand, two hundred twenty-nine".