71128019 has 2 divisors, whose sum is σ = 71128020. Its totient is φ = 71128018.

The previous prime is 71128007. The next prime is 71128021. The reversal of 71128019 is 91082117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71128019 - 2⁴ = 71128003 is a prime.

It is a super-2 number, since 2×71128019² = 10118390173728722, which contains 22 as substring.

Together with 71128021, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4180457 and since 71128019 and 4180457 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 71127982 and 71128000.

It is not a weakly prime, because it can be changed into another prime (71128049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35564009 + 35564010.

It is an arithmetic number, because the mean of its divisors is an integer number (35564010).

Almost surely, 2^71128019 is an apocalyptic number.

71128019 is a deficient number, since it is larger than the sum of its proper divisors (1).

71128019 is an equidigital number, since it uses as much as digits as its factorization.

71128019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 71128019 is about 8433.7428820186. The cubic root of 71128019 is about 414.3305003222.

The spelling of 71128019 in words is "seventy-one million, one hundred twenty-eight thousand, nineteen".