71070137 has 2 divisors, whose sum is σ = 71070138. Its totient is φ = 71070136.

The previous prime is 71070091. The next prime is 71070151. The reversal of 71070137 is 73107017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70829056 + 241081 = 8416^2 + 491^2 .

It is an emirp because it is prime and its reverse (73107017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71070137 - 2¹² = 71066041 is a prime.

It is equal to p_4177232 and since 71070137 and 4177232 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71070187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35535068 + 35535069.

It is an arithmetic number, because the mean of its divisors is an integer number (35535069).

Almost surely, 2^71070137 is an apocalyptic number.

It is an amenable number.

71070137 is a deficient number, since it is larger than the sum of its proper divisors (1).

71070137 is an equidigital number, since it uses as much as digits as its factorization.

71070137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1029, while the sum is 26.

The square root of 71070137 is about 8430.3106111222. The cubic root of 71070137 is about 414.2180796162.

The spelling of 71070137 in words is "seventy-one million, seventy thousand, one hundred thirty-seven".