71384431 has 2 divisors, whose sum is σ = 71384432. Its totient is φ = 71384430.

The previous prime is 71384407. The next prime is 71384447. The reversal of 71384431 is 13448317.

It is a strong prime.

It is an emirp because it is prime and its reverse (13448317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71384431 - 2²¹ = 69287279 is a prime.

It is a super-3 number, since 3×71384431³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 71384393 and 71384402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71384461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35692215 + 35692216.

It is an arithmetic number, because the mean of its divisors is an integer number (35692216).

Almost surely, 2^71384431 is an apocalyptic number.

71384431 is a deficient number, since it is larger than the sum of its proper divisors (1).

71384431 is an equidigital number, since it uses as much as digits as its factorization.

71384431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 71384431 is about 8448.9307607531. The cubic root of 71384431 is about 414.8277816412.

The spelling of 71384431 in words is "seventy-one million, three hundred eighty-four thousand, four hundred thirty-one".