71718401 has 2 divisors, whose sum is σ = 71718402. Its totient is φ = 71718400.

The previous prime is 71718379. The next prime is 71718419. The reversal of 71718401 is 10481717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 6754801 = 8060^2 + 2599^2 .

It is an emirp because it is prime and its reverse (10481717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71718401 - 2²² = 67524097 is a prime.

It is not a weakly prime, because it can be changed into another prime (71718431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35859200 + 35859201.

It is an arithmetic number, because the mean of its divisors is an integer number (35859201).

Almost surely, 2^71718401 is an apocalyptic number.

It is an amenable number.

71718401 is a deficient number, since it is larger than the sum of its proper divisors (1).

71718401 is an equidigital number, since it uses as much as digits as its factorization.

71718401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 71718401 is about 8468.6717376458. The cubic root of 71718401 is about 415.4736953241.

The spelling of 71718401 in words is "seventy-one million, seven hundred eighteen thousand, four hundred one".