71049757 has 2 divisors, whose sum is σ = 71049758. Its totient is φ = 71049756.

The previous prime is 71049751. The next prime is 71049773. The reversal of 71049757 is 75794017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 14333796 = 7531^2 + 3786^2 .

It is a cyclic number.

It is not a de Polignac number, because 71049757 - 2²³ = 62661149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71049751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35524878 + 35524879.

It is an arithmetic number, because the mean of its divisors is an integer number (35524879).

Almost surely, 2^71049757 is an apocalyptic number.

It is an amenable number.

71049757 is a deficient number, since it is larger than the sum of its proper divisors (1).

71049757 is an equidigital number, since it uses as much as digits as its factorization.

71049757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 71049757 is about 8429.1017908197. The cubic root of 71049757 is about 414.1784822463.

It can be divided in two parts, 7104 and 9757, that added together give a palindrome (16861).

The spelling of 71049757 in words is "seventy-one million, forty-nine thousand, seven hundred fifty-seven".