71022493 has 4 divisors (see below), whose sum is σ = 71725788. Its totient is φ = 70319200.

The previous prime is 71022461. The next prime is 71022509. The reversal of 71022493 is 39422017.

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 44582329 + 26440164 = 6677^2 + 5142^2 .

It is a cyclic number.

It is not a de Polignac number, because 71022493 - 2⁵ = 71022461 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 (71022403) 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, 351496 + ... + 351697.

It is an arithmetic number, because the mean of its divisors is an integer number (17931447).

Almost surely, 2^71022493 is an apocalyptic number.

It is an amenable number.

71022493 is a deficient number, since it is larger than the sum of its proper divisors (703295).

71022493 is a wasteful number, since it uses less digits than its factorization.

71022493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703294.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 71022493 is about 8427.4843814747. The cubic root of 71022493 is about 414.1254977497.

The spelling of 71022493 in words is "seventy-one million, twenty-two thousand, four hundred ninety-three".