71317619 has 2 divisors, whose sum is σ = 71317620. Its totient is φ = 71317618.

The previous prime is 71317559. The next prime is 71317627. The reversal of 71317619 is 91671317.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71317619 is a prime.

It is a super-2 number, since 2×71317619² = 10172405559658322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71317219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35658809 + 35658810.

It is an arithmetic number, because the mean of its divisors is an integer number (35658810).

Almost surely, 2^71317619 is an apocalyptic number.

71317619 is a deficient number, since it is larger than the sum of its proper divisors (1).

71317619 is an equidigital number, since it uses as much as digits as its factorization.

71317619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 35.

The square root of 71317619 is about 8444.9759620735. The cubic root of 71317619 is about 414.6983223899.

The spelling of 71317619 in words is "seventy-one million, three hundred seventeen thousand, six hundred nineteen".