71220983 has 4 divisors (see below), whose sum is σ = 71243040. Its totient is φ = 71198928.

The previous prime is 71220971. The next prime is 71220997. The reversal of 71220983 is 38902217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38902217 = 2441 ⋅15937.

It is a cyclic number.

It is not a de Polignac number, because 71220983 - 2⁸ = 71220727 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 (71220953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135 + ... + 12992.

It is an arithmetic number, because the mean of its divisors is an integer number (17810760).

Almost surely, 2^71220983 is an apocalyptic number.

71220983 is a deficient number, since it is larger than the sum of its proper divisors (22057).

71220983 is a wasteful number, since it uses less digits than its factorization.

71220983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22056.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 71220983 is about 8439.2525142930. The cubic root of 71220983 is about 414.5109311026.

The spelling of 71220983 in words is "seventy-one million, two hundred twenty thousand, nine hundred eighty-three".