71423279 has 2 divisors, whose sum is σ = 71423280. Its totient is φ = 71423278.

The previous prime is 71423227. The next prime is 71423281. The reversal of 71423279 is 97232417.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71423279 is a prime.

It is a super-2 number, since 2×71423279² = 10202569566223682, which contains 22 as substring.

Together with 71423281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71423179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35711639 + 35711640.

It is an arithmetic number, because the mean of its divisors is an integer number (35711640).

Almost surely, 2^71423279 is an apocalyptic number.

71423279 is a deficient number, since it is larger than the sum of its proper divisors (1).

71423279 is an equidigital number, since it uses as much as digits as its factorization.

71423279 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 71423279 is about 8451.2294371884. The cubic root of 71423279 is about 414.9030189022.

The spelling of 71423279 in words is "seventy-one million, four hundred twenty-three thousand, two hundred seventy-nine".