71759081 has 2 divisors, whose sum is σ = 71759082. Its totient is φ = 71759080.

The previous prime is 71759059. The next prime is 71759087. The reversal of 71759081 is 18095717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50183056 + 21576025 = 7084^2 + 4645^2 .

It is an emirp because it is prime and its reverse (18095717) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71759081 is a prime.

It is a super-2 number, since 2×71759081² = 10298731411929122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71759087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35879540 + 35879541.

It is an arithmetic number, because the mean of its divisors is an integer number (35879541).

Almost surely, 2^71759081 is an apocalyptic number.

It is an amenable number.

71759081 is a deficient number, since it is larger than the sum of its proper divisors (1).

71759081 is an equidigital number, since it uses as much as digits as its factorization.

71759081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 71759081 is about 8471.0731905704. The cubic root of 71759081 is about 415.5522352575.

The spelling of 71759081 in words is "seventy-one million, seven hundred fifty-nine thousand, eighty-one".