19211149 has 2 divisors, whose sum is σ = 19211150. Its totient is φ = 19211148.

The previous prime is 19211123. The next prime is 19211183. The reversal of 19211149 is 94111291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15069924 + 4141225 = 3882^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 19211149 - 2⁵ = 19211117 is a prime.

It is equal to p_1223596 and since 19211149 and 1223596 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19211119) 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, 9605574 + 9605575.

It is an arithmetic number, because the mean of its divisors is an integer number (9605575).

Almost surely, 2^19211149 is an apocalyptic number.

It is an amenable number.

19211149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19211149 is an equidigital number, since it uses as much as digits as its factorization.

19211149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 28.

The square root of 19211149 is about 4383.0524751593. The cubic root of 19211149 is about 267.8249999203.

The spelling of 19211149 in words is "nineteen million, two hundred eleven thousand, one hundred forty-nine".