71203997 has 2 divisors, whose sum is σ = 71203998. Its totient is φ = 71203996.

The previous prime is 71203987. The next prime is 71204009. The reversal of 71203997 is 79930217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50537881 + 20666116 = 7109^2 + 4546^2 .

It is a cyclic number.

It is not a de Polignac number, because 71203997 - 2¹⁶ = 71138461 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71203997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71203907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35601998 + 35601999.

It is an arithmetic number, because the mean of its divisors is an integer number (35601999).

Almost surely, 2^71203997 is an apocalyptic number.

It is an amenable number.

71203997 is a deficient number, since it is larger than the sum of its proper divisors (1).

71203997 is an equidigital number, since it uses as much as digits as its factorization.

71203997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 71203997 is about 8438.2460855322. The cubic root of 71203997 is about 414.4779752601.

The spelling of 71203997 in words is "seventy-one million, two hundred three thousand, nine hundred ninety-seven".