70783717 has 2 divisors, whose sum is σ = 70783718. Its totient is φ = 70783716.

The previous prime is 70783709. The next prime is 70783771. The reversal of 70783717 is 71738707.

Together with next prime (70783771) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67914081 + 2869636 = 8241^2 + 1694^2 .

It is a cyclic number.

It is not a de Polignac number, because 70783717 - 2³ = 70783709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70783717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70783777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35391858 + 35391859.

It is an arithmetic number, because the mean of its divisors is an integer number (35391859).

Almost surely, 2^70783717 is an apocalyptic number.

It is an amenable number.

70783717 is a deficient number, since it is larger than the sum of its proper divisors (1).

70783717 is an equidigital number, since it uses as much as digits as its factorization.

70783717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 40.

The square root of 70783717 is about 8413.3059495064. The cubic root of 70783717 is about 413.6608831959.

The spelling of 70783717 in words is "seventy million, seven hundred eighty-three thousand, seven hundred seventeen".