149788169 has 2 divisors, whose sum is σ = 149788170. Its totient is φ = 149788168.

The previous prime is 149788147. The next prime is 149788183. The reversal of 149788169 is 961887941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147938569 + 1849600 = 12163^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 149788169 - 2¹⁶ = 149722633 is a prime.

It is a super-2 number, since 2×149788169² = 44872991144745122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149788169.

It is not a weakly prime, because it can be changed into another prime (149788069) 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, 74894084 + 74894085.

It is an arithmetic number, because the mean of its divisors is an integer number (74894085).

Almost surely, 2^149788169 is an apocalyptic number.

It is an amenable number.

149788169 is a deficient number, since it is larger than the sum of its proper divisors (1).

149788169 is an equidigital number, since it uses as much as digits as its factorization.

149788169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 53.

The square root of 149788169 is about 12238.7976942182. The cubic root of 149788169 is about 531.0790511746.

The spelling of 149788169 in words is "one hundred forty-nine million, seven hundred eighty-eight thousand, one hundred sixty-nine".