70856237 has 2 divisors, whose sum is σ = 70856238. Its totient is φ = 70856236.

The previous prime is 70856207. The next prime is 70856239. The reversal of 70856237 is 73265807.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65593801 + 5262436 = 8099^2 + 2294^2 .

It is an emirp because it is prime and its reverse (73265807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70856237 - 2²⁴ = 54079021 is a prime.

Together with 70856239, it forms a pair of twin primes.

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 70856237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70856239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35428118 + 35428119.

It is an arithmetic number, because the mean of its divisors is an integer number (35428119).

Almost surely, 2^70856237 is an apocalyptic number.

It is an amenable number.

70856237 is a deficient number, since it is larger than the sum of its proper divisors (1).

70856237 is an equidigital number, since it uses as much as digits as its factorization.

70856237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 70856237 is about 8417.6146858834. The cubic root of 70856237 is about 413.8021042258.

The spelling of 70856237 in words is "seventy million, eight hundred fifty-six thousand, two hundred thirty-seven".