19139071879 has 2 divisors, whose sum is σ = 19139071880. Its totient is φ = 19139071878.

The previous prime is 19139071877. The next prime is 19139071967. The reversal of 19139071879 is 97817093191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19139071879 - 2¹ = 19139071877 is a prime.

Together with 19139071877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19139071873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569535939 + 9569535940.

It is an arithmetic number, because the mean of its divisors is an integer number (9569535940).

Almost surely, 2^19139071879 is an apocalyptic number.

19139071879 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139071879 is an equidigital number, since it uses as much as digits as its factorization.

19139071879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 55.

The spelling of 19139071879 in words is "nineteen billion, one hundred thirty-nine million, seventy-one thousand, eight hundred seventy-nine".