71380706 has 4 divisors (see below), whose sum is σ = 107071062. Its totient is φ = 35690352.

The previous prime is 71380697. The next prime is 71380709. The reversal of 71380706 is 60708317.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60708317 = 569 ⋅106693.

It can be written as a sum of positive squares in only one way, i.e., 39175081 + 32205625 = 6259^2 + 5675^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71380709) 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, 17845175 + ... + 17845178.

Almost surely, 2^71380706 is an apocalyptic number.

71380706 is a deficient number, since it is larger than the sum of its proper divisors (35690356).

71380706 is a wasteful number, since it uses less digits than its factorization.

71380706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35690355.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 71380706 is about 8448.7103157819. The cubic root of 71380706 is about 414.8205659671.

The spelling of 71380706 in words is "seventy-one million, three hundred eighty thousand, seven hundred six".