71224379 has 2 divisors, whose sum is σ = 71224380. Its totient is φ = 71224378.

The previous prime is 71224343. The next prime is 71224381. The reversal of 71224379 is 97342217.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71224379 is a prime.

It is a Sophie Germain prime.

Together with 71224381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71224079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35612189 + 35612190.

It is an arithmetic number, because the mean of its divisors is an integer number (35612190).

Almost surely, 2^71224379 is an apocalyptic number.

71224379 is a deficient number, since it is larger than the sum of its proper divisors (1).

71224379 is an equidigital number, since it uses as much as digits as its factorization.

71224379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 71224379 is about 8439.4537145481. The cubic root of 71224379 is about 414.5175193143.

The spelling of 71224379 in words is "seventy-one million, two hundred twenty-four thousand, three hundred seventy-nine".