71331037 has 2 divisors, whose sum is σ = 71331038. Its totient is φ = 71331036.

The previous prime is 71331011. The next prime is 71331049. The reversal of 71331037 is 73013317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56385081 + 14945956 = 7509^2 + 3866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71331037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71331067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35665518 + 35665519.

It is an arithmetic number, because the mean of its divisors is an integer number (35665519).

Almost surely, 2^71331037 is an apocalyptic number.

It is an amenable number.

71331037 is a deficient number, since it is larger than the sum of its proper divisors (1).

71331037 is an equidigital number, since it uses as much as digits as its factorization.

71331037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323, while the sum is 25.

The square root of 71331037 is about 8445.7703615478. The cubic root of 71331037 is about 414.7243284607.

The spelling of 71331037 in words is "seventy-one million, three hundred thirty-one thousand, thirty-seven".