71149983 has 8 divisors (see below), whose sum is σ = 95364096. Its totient is φ = 47184600.

The previous prime is 71149957. The next prime is 71149987. The reversal of 71149983 is 38994117.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71149983 - 2¹⁴ = 71133599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71149987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61513 + ... + 62658.

It is an arithmetic number, because the mean of its divisors is an integer number (11920512).

Almost surely, 2^71149983 is an apocalyptic number.

71149983 is a deficient number, since it is larger than the sum of its proper divisors (24214113).

71149983 is a wasteful number, since it uses less digits than its factorization.

71149983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124365.

The product of its digits is 54432, while the sum is 42.

The square root of 71149983 is about 8435.0449317120. The cubic root of 71149983 is about 414.3731437075.

The spelling of 71149983 in words is "seventy-one million, one hundred forty-nine thousand, nine hundred eighty-three".