71873381 has 2 divisors, whose sum is σ = 71873382. Its totient is φ = 71873380.

The previous prime is 71873359. The next prime is 71873419. The reversal of 71873381 is 18337817.

It is an a-pointer prime, because the next prime (71873419) can be obtained adding 71873381 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 217156 = 8465^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 71873381 - 2¹⁰ = 71872357 is a prime.

It is a super-2 number, since 2×71873381² = 10331565792742322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71873341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35936690 + 35936691.

It is an arithmetic number, because the mean of its divisors is an integer number (35936691).

Almost surely, 2^71873381 is an apocalyptic number.

It is an amenable number.

71873381 is a deficient number, since it is larger than the sum of its proper divisors (1).

71873381 is an equidigital number, since it uses as much as digits as its factorization.

71873381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 71873381 is about 8477.8169949581. The cubic root of 71873381 is about 415.7727528728.

The spelling of 71873381 in words is "seventy-one million, eight hundred seventy-three thousand, three hundred eighty-one".