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168420149 is a prime number
BaseRepresentation
bin10100000100111…
…10001100110101
3102201220122000022
422002132030311
5321103421044
624413454525
74113355562
oct1202361465
9381818008
10168420149
1187083607
12484a1445
1328b7b1c1
1418521869
15ebbc3ee
hexa09e335

168420149 has 2 divisors, whose sum is σ = 168420150. Its totient is φ = 168420148.

The previous prime is 168420103. The next prime is 168420221. The reversal of 168420149 is 941024861.

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., 149279524 + 19140625 = 12218^2 + 4375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-168420149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168420949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84210074 + 84210075.

It is an arithmetic number, because the mean of its divisors is an integer number (84210075).

Almost surely, 2168420149 is an apocalyptic number.

It is an amenable number.

168420149 is a deficient number, since it is larger than the sum of its proper divisors (1).

168420149 is an equidigital number, since it uses as much as digits as its factorization.

168420149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 168420149 is about 12977.6788756696. The cubic root of 168420149 is about 552.2444361752.

The spelling of 168420149 in words is "one hundred sixty-eight million, four hundred twenty thousand, one hundred forty-nine".