19129081 has 2 divisors, whose sum is σ = 19129082. Its totient is φ = 19129080.

The previous prime is 19129043. The next prime is 19129087. The reversal of 19129081 is 18092191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10949481 + 8179600 = 3309^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 19129081 - 2¹⁵ = 19096313 is a prime.

It is a super-2 number, since 2×19129081² = 731843479809122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19129087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9564540 + 9564541.

It is an arithmetic number, because the mean of its divisors is an integer number (9564541).

Almost surely, 2^19129081 is an apocalyptic number.

It is an amenable number.

19129081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19129081 is an equidigital number, since it uses as much as digits as its factorization.

19129081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 19129081 is about 4373.6804867297. The cubic root of 19129081 is about 267.4430821923.

The spelling of 19129081 in words is "nineteen million, one hundred twenty-nine thousand, eighty-one".