71232137 has 2 divisors, whose sum is σ = 71232138. Its totient is φ = 71232136.

The previous prime is 71232101. The next prime is 71232143. The reversal of 71232137 is 73123217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58813561 + 12418576 = 7669^2 + 3524^2 .

It is an emirp because it is prime and its reverse (73123217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71232137 - 2¹² = 71228041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71238137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35616068 + 35616069.

It is an arithmetic number, because the mean of its divisors is an integer number (35616069).

Almost surely, 2^71232137 is an apocalyptic number.

It is an amenable number.

71232137 is a deficient number, since it is larger than the sum of its proper divisors (1).

71232137 is an equidigital number, since it uses as much as digits as its factorization.

71232137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 26.

The square root of 71232137 is about 8439.9133289389. The cubic root of 71232137 is about 414.5325689842.

The spelling of 71232137 in words is "seventy-one million, two hundred thirty-two thousand, one hundred thirty-seven".