71307077 has 4 divisors (see below), whose sum is σ = 73046316. Its totient is φ = 69567840.

The previous prime is 71307031. The next prime is 71307083. The reversal of 71307077 is 77070317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 70324996 = 991^2 + 8386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71307077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71307007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869558 + ... + 869639.

It is an arithmetic number, because the mean of its divisors is an integer number (18261579).

Almost surely, 2^71307077 is an apocalyptic number.

It is an amenable number.

71307077 is a deficient number, since it is larger than the sum of its proper divisors (1739239).

71307077 is a wasteful number, since it uses less digits than its factorization.

71307077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739238.

The product of its (nonzero) digits is 7203, while the sum is 32.

The square root of 71307077 is about 8444.3517809243. The cubic root of 71307077 is about 414.6778881447.

The spelling of 71307077 in words is "seventy-one million, three hundred seven thousand, seventy-seven".