71785741 has 2 divisors, whose sum is σ = 71785742. Its totient is φ = 71785740.

The previous prime is 71785733. The next prime is 71785751. The reversal of 71785741 is 14758717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44275716 + 27510025 = 6654^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 71785741 - 2³ = 71785733 is a prime.

It is a super-2 number, since 2×71785741² = 10306385221838162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71785694 and 71785703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71785751) 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, 35892870 + 35892871.

It is an arithmetic number, because the mean of its divisors is an integer number (35892871).

Almost surely, 2^71785741 is an apocalyptic number.

It is an amenable number.

71785741 is a deficient number, since it is larger than the sum of its proper divisors (1).

71785741 is an equidigital number, since it uses as much as digits as its factorization.

71785741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54880, while the sum is 40.

The square root of 71785741 is about 8472.6466349069. The cubic root of 71785741 is about 415.6036910024.

The spelling of 71785741 in words is "seventy-one million, seven hundred eighty-five thousand, seven hundred forty-one".