71099641 has 2 divisors, whose sum is σ = 71099642. Its totient is φ = 71099640.

The previous prime is 71099629. The next prime is 71099687. The reversal of 71099641 is 14699017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 7817616 = 7955^2 + 2796^2 .

It is an emirp because it is prime and its reverse (14699017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71099641 - 2²¹ = 69002489 is a prime.

It is a Chen prime.

It is equal to p_4178890 and since 71099641 and 4178890 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71099641.

It is not a weakly prime, because it can be changed into another prime (71099621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35549820 + 35549821.

It is an arithmetic number, because the mean of its divisors is an integer number (35549821).

Almost surely, 2^71099641 is an apocalyptic number.

It is an amenable number.

71099641 is a deficient number, since it is larger than the sum of its proper divisors (1).

71099641 is an equidigital number, since it uses as much as digits as its factorization.

71099641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 71099641 is about 8432.0603057616. The cubic root of 71099641 is about 414.2753910739.

The spelling of 71099641 in words is "seventy-one million, ninety-nine thousand, six hundred forty-one".