71971093 has 2 divisors, whose sum is σ = 71971094. Its totient is φ = 71971092.

The previous prime is 71971087. The next prime is 71971111. The reversal of 71971093 is 39017917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69605649 + 2365444 = 8343^2 + 1538^2 .

It is an emirp because it is prime and its reverse (39017917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71971093 - 2⁵ = 71971061 is a prime.

It is a super-2 number, since 2×71971093² = 10359676455229298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71971063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35985546 + 35985547.

It is an arithmetic number, because the mean of its divisors is an integer number (35985547).

Almost surely, 2^71971093 is an apocalyptic number.

It is an amenable number.

71971093 is a deficient number, since it is larger than the sum of its proper divisors (1).

71971093 is an equidigital number, since it uses as much as digits as its factorization.

71971093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 71971093 is about 8483.5778419250. The cubic root of 71971093 is about 415.9610821735.

The spelling of 71971093 in words is "seventy-one million, nine hundred seventy-one thousand, ninety-three".