71219387 has 2 divisors, whose sum is σ = 71219388. Its totient is φ = 71219386.

The previous prime is 71219377. The next prime is 71219399. The reversal of 71219387 is 78391217.

It is a weak prime.

It is an emirp because it is prime and its reverse (78391217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71219387 - 2²⁰ = 70170811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71219387.

It is not a weakly prime, because it can be changed into another prime (71219327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35609693 + 35609694.

It is an arithmetic number, because the mean of its divisors is an integer number (35609694).

Almost surely, 2^71219387 is an apocalyptic number.

71219387 is a deficient number, since it is larger than the sum of its proper divisors (1).

71219387 is an equidigital number, since it uses as much as digits as its factorization.

71219387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 71219387 is about 8439.1579556257. The cubic root of 71219387 is about 414.5078348035.

The spelling of 71219387 in words is "seventy-one million, two hundred nineteen thousand, three hundred eighty-seven".