19139129 has 2 divisors, whose sum is σ = 19139130. Its totient is φ = 19139128.

The previous prime is 19139119. The next prime is 19139143. The reversal of 19139129 is 92193191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 846400 = 4277^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 19139129 - 2²⁴ = 2361913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19139119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569564 + 9569565.

It is an arithmetic number, because the mean of its divisors is an integer number (9569565).

Almost surely, 2^19139129 is an apocalyptic number.

It is an amenable number.

19139129 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139129 is an equidigital number, since it uses as much as digits as its factorization.

19139129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 35.

The square root of 19139129 is about 4374.8290252306. The cubic root of 19139129 is about 267.4899009202.

The spelling of 19139129 in words is "nineteen million, one hundred thirty-nine thousand, one hundred twenty-nine".