70785613 has 2 divisors, whose sum is σ = 70785614. Its totient is φ = 70785612.

The previous prime is 70785601. The next prime is 70785623. The reversal of 70785613 is 31658707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 10614564 = 7757^2 + 3258^2 .

It is a cyclic number.

It is not a de Polignac number, because 70785613 - 2¹⁷ = 70654541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70785623) 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, 35392806 + 35392807.

It is an arithmetic number, because the mean of its divisors is an integer number (35392807).

Almost surely, 2^70785613 is an apocalyptic number.

It is an amenable number.

70785613 is a deficient number, since it is larger than the sum of its proper divisors (1).

70785613 is an equidigital number, since it uses as much as digits as its factorization.

70785613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 70785613 is about 8413.4186274071. The cubic root of 70785613 is about 413.6645765784.

It can be divided in two parts, 707 and 85613, that added together give a triangular number (86320 = T₄₁₅).

The spelling of 70785613 in words is "seventy million, seven hundred eighty-five thousand, six hundred thirteen".