19629139 has 2 divisors, whose sum is σ = 19629140. Its totient is φ = 19629138.

The previous prime is 19629131. The next prime is 19629149. The reversal of 19629139 is 93192691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19629139 - 2³ = 19629131 is a prime.

It is not a weakly prime, because it can be changed into another prime (19629131) 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, 9814569 + 9814570.

It is an arithmetic number, because the mean of its divisors is an integer number (9814570).

Almost surely, 2^19629139 is an apocalyptic number.

19629139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19629139 is an equidigital number, since it uses as much as digits as its factorization.

19629139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 19629139 is about 4430.4784166047. The cubic root of 19629139 is about 269.7534970113.

The spelling of 19629139 in words is "nineteen million, six hundred twenty-nine thousand, one hundred thirty-nine".