71894881 has 2 divisors, whose sum is σ = 71894882. Its totient is φ = 71894880.

The previous prime is 71894873. The next prime is 71894897. The reversal of 71894881 is 18849817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69155856 + 2739025 = 8316^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 71894881 - 2³ = 71894873 is a prime.

It is a super-2 number, since 2×71894881² = 10337747828008322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71894861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35947440 + 35947441.

It is an arithmetic number, because the mean of its divisors is an integer number (35947441).

Almost surely, 2^71894881 is an apocalyptic number.

It is an amenable number.

71894881 is a deficient number, since it is larger than the sum of its proper divisors (1).

71894881 is an equidigital number, since it uses as much as digits as its factorization.

71894881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 46.

The square root of 71894881 is about 8479.0849152488. The cubic root of 71894881 is about 415.8142064349.

The spelling of 71894881 in words is "seventy-one million, eight hundred ninety-four thousand, eight hundred eighty-one".