19149161 has 2 divisors, whose sum is σ = 19149162. Its totient is φ = 19149160.

The previous prime is 19149149. The next prime is 19149167. The reversal of 19149161 is 16194191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 3308761 = 3980^2 + 1819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19149161 is a prime.

It is equal to p_1219919 and since 19149161 and 1219919 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (19149167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9574580 + 9574581.

It is an arithmetic number, because the mean of its divisors is an integer number (9574581).

Almost surely, 2^19149161 is an apocalyptic number.

It is an amenable number.

19149161 is a deficient number, since it is larger than the sum of its proper divisors (1).

19149161 is an equidigital number, since it uses as much as digits as its factorization.

19149161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 32.

The square root of 19149161 is about 4375.9754341175. The cubic root of 19149161 is about 267.5366287513.

The spelling of 19149161 in words is "nineteen million, one hundred forty-nine thousand, one hundred sixty-one".