19000000079 has 2 divisors, whose sum is σ = 19000000080. Its totient is φ = 19000000078.

The previous prime is 19000000049. The next prime is 19000000091. The reversal of 19000000079 is 97000000091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19000000079 is a prime.

It is a super-2 number, since 2×19000000079² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18999999994 and 19000000057.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19000000049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9500000039 + 9500000040.

It is an arithmetic number, because the mean of its divisors is an integer number (9500000040).

Almost surely, 2^19000000079 is an apocalyptic number.

19000000079 is a deficient number, since it is larger than the sum of its proper divisors (1).

19000000079 is an equidigital number, since it uses as much as digits as its factorization.

19000000079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The spelling of 19000000079 in words is "nineteen billion, seventy-nine", and thus it is an aban number and an uban number.