19608139 has 2 divisors, whose sum is σ = 19608140. Its totient is φ = 19608138.

The previous prime is 19608131. The next prime is 19608181. The reversal of 19608139 is 93180691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19608139 - 2³ = 19608131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19608098 and 19608107.

It is not a weakly prime, because it can be changed into another prime (19608131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9804069 + 9804070.

It is an arithmetic number, because the mean of its divisors is an integer number (9804070).

Almost surely, 2^19608139 is an apocalyptic number.

19608139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19608139 is an equidigital number, since it uses as much as digits as its factorization.

19608139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 19608139 is about 4428.1078351820. The cubic root of 19608139 is about 269.6572651662.

The spelling of 19608139 in words is "nineteen million, six hundred eight thousand, one hundred thirty-nine".