19149149 has 2 divisors, whose sum is σ = 19149150. Its totient is φ = 19149148.

The previous prime is 19149139. The next prime is 19149161. The reversal of 19149149 is 94194191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18576100 + 573049 = 4310^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 19149149 - 2¹⁶ = 19083613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19149139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9574574 + 9574575.

It is an arithmetic number, because the mean of its divisors is an integer number (9574575).

Almost surely, 2^19149149 is an apocalyptic number.

It is an amenable number.

19149149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19149149 is an equidigital number, since it uses as much as digits as its factorization.

19149149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 38.

The square root of 19149149 is about 4375.9740629944. The cubic root of 19149149 is about 267.5365728666.

The spelling of 19149149 in words is "nineteen million, one hundred forty-nine thousand, one hundred forty-nine".