71031007 has 4 divisors (see below), whose sum is σ = 71076816. Its totient is φ = 70985200.

The previous prime is 71030957. The next prime is 71031017. The reversal of 71031007 is 70013017.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71031007 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 (71031017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20494 + ... + 23707.

It is an arithmetic number, because the mean of its divisors is an integer number (17769204).

Almost surely, 2^71031007 is an apocalyptic number.

71031007 is a deficient number, since it is larger than the sum of its proper divisors (45809).

71031007 is a wasteful number, since it uses less digits than its factorization.

71031007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45808.

The product of its (nonzero) digits is 147, while the sum is 19.

The square root of 71031007 is about 8427.9894992815. The cubic root of 71031007 is about 414.1420452004.

The spelling of 71031007 in words is "seventy-one million, thirty-one thousand, seven".