71505701 has 2 divisors, whose sum is σ = 71505702. Its totient is φ = 71505700.

The previous prime is 71505697. The next prime is 71505703. The reversal of 71505701 is 10750517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69472225 + 2033476 = 8335^2 + 1426^2 .

It is an emirp because it is prime and its reverse (10750517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71505701 - 2² = 71505697 is a prime.

It is a super-2 number, since 2×71505701² = 10226130551002802, which contains 22 as substring.

Together with 71505703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71505703) 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, 35752850 + 35752851.

It is an arithmetic number, because the mean of its divisors is an integer number (35752851).

Almost surely, 2^71505701 is an apocalyptic number.

It is an amenable number.

71505701 is a deficient number, since it is larger than the sum of its proper divisors (1).

71505701 is an equidigital number, since it uses as much as digits as its factorization.

71505701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1225, while the sum is 26.

The square root of 71505701 is about 8456.1043631214. The cubic root of 71505701 is about 415.0625560125.

The spelling of 71505701 in words is "seventy-one million, five hundred five thousand, seven hundred one".