71694431 has 2 divisors, whose sum is σ = 71694432. Its totient is φ = 71694430.

The previous prime is 71694401. The next prime is 71694433. The reversal of 71694431 is 13449617.

It is a strong prime.

It is an emirp because it is prime and its reverse (13449617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71694431 - 2¹⁰ = 71693407 is a prime.

It is a super-2 number, since 2×71694431² = 10280182872827522, which contains 22 as substring.

Together with 71694433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71694391 and 71694400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71694433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35847215 + 35847216.

It is an arithmetic number, because the mean of its divisors is an integer number (35847216).

Almost surely, 2^71694431 is an apocalyptic number.

71694431 is a deficient number, since it is larger than the sum of its proper divisors (1).

71694431 is an equidigital number, since it uses as much as digits as its factorization.

71694431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 71694431 is about 8467.2564033458. The cubic root of 71694431 is about 415.4274030939.

The spelling of 71694431 in words is "seventy-one million, six hundred ninety-four thousand, four hundred thirty-one".