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161559863 is a prime number
BaseRepresentation
bin10011010000100…
…11010100110111
3102021000002110122
421220103110313
5312324403423
624010442155
74001144003
oct1150232467
9367002418
10161559863
1183218353
124613335b
132761876a
1417657703
15e2b48c8
hex9a13537

161559863 has 2 divisors, whose sum is σ = 161559864. Its totient is φ = 161559862.

The previous prime is 161559859. The next prime is 161559887. The reversal of 161559863 is 368955161.

161559863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161559863 - 22 = 161559859 is a prime.

It is a super-2 number, since 2×1615598632 = 52203178665157538, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161559763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80779931 + 80779932.

It is an arithmetic number, because the mean of its divisors is an integer number (80779932).

Almost surely, 2161559863 is an apocalyptic number.

161559863 is a deficient number, since it is larger than the sum of its proper divisors (1).

161559863 is an equidigital number, since it uses as much as digits as its factorization.

161559863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 161559863 is about 12710.6200871555. The cubic root of 161559863 is about 544.6420374734.

The spelling of 161559863 in words is "one hundred sixty-one million, five hundred fifty-nine thousand, eight hundred sixty-three".