71819801 has 2 divisors, whose sum is σ = 71819802. Its totient is φ = 71819800.

The previous prime is 71819743. The next prime is 71819819. The reversal of 71819801 is 10891817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62789776 + 9030025 = 7924^2 + 3005^2 .

It is an emirp because it is prime and its reverse (10891817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71819801 - 2¹⁸ = 71557657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71819821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35909900 + 35909901.

It is an arithmetic number, because the mean of its divisors is an integer number (35909901).

Almost surely, 2^71819801 is an apocalyptic number.

It is an amenable number.

71819801 is a deficient number, since it is larger than the sum of its proper divisors (1).

71819801 is an equidigital number, since it uses as much as digits as its factorization.

71819801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 71819801 is about 8474.6563942145. The cubic root of 71819801 is about 415.6694107556.

The spelling of 71819801 in words is "seventy-one million, eight hundred nineteen thousand, eight hundred one".