71980141 has 4 divisors (see below), whose sum is σ = 72214912. Its totient is φ = 71745372.

The previous prime is 71980127. The next prime is 71980147. The reversal of 71980141 is 14108917.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14108917 = 139 ⋅101503.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71980141 is a prime.

It is a super-2 number, since 2×71980141² = 10362281396759762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71980147) 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, 116925 + ... + 117538.

It is an arithmetic number, because the mean of its divisors is an integer number (18053728).

Almost surely, 2^71980141 is an apocalyptic number.

It is an amenable number.

71980141 is a deficient number, since it is larger than the sum of its proper divisors (234771).

71980141 is a wasteful number, since it uses less digits than its factorization.

71980141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234770.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 71980141 is about 8484.1110907390. Note that the first 3 decimals coincide. The cubic root of 71980141 is about 415.9785125890.

The spelling of 71980141 in words is "seventy-one million, nine hundred eighty thousand, one hundred forty-one".