71390941 has 4 divisors (see below), whose sum is σ = 72097884. Its totient is φ = 70684000.

The previous prime is 71390911. The next prime is 71390951. The reversal of 71390941 is 14909317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14909317 = 101 ⋅147617.

It can be written as a sum of positive squares in 2 ways, for example, as 66422500 + 4968441 = 8150^2 + 2229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71390941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71390897 and 71390906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71390911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353320 + ... + 353521.

It is an arithmetic number, because the mean of its divisors is an integer number (18024471).

Almost surely, 2^71390941 is an apocalyptic number.

It is an amenable number.

71390941 is a deficient number, since it is larger than the sum of its proper divisors (706943).

71390941 is a wasteful number, since it uses less digits than its factorization.

71390941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706942.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 71390941 is about 8449.3160078198. The cubic root of 71390941 is about 414.8403915186.

The spelling of 71390941 in words is "seventy-one million, three hundred ninety thousand, nine hundred forty-one".