70985513 has 2 divisors, whose sum is σ = 70985514. Its totient is φ = 70985512.

The previous prime is 70985459. The next prime is 70985531. The reversal of 70985513 is 31558907.

Together with next prime (70985531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67190809 + 3794704 = 8197^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 70985513 - 2⁶ = 70985449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70985113) 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, 35492756 + 35492757.

It is an arithmetic number, because the mean of its divisors is an integer number (35492757).

Almost surely, 2^70985513 is an apocalyptic number.

It is an amenable number.

70985513 is a deficient number, since it is larger than the sum of its proper divisors (1).

70985513 is an equidigital number, since it uses as much as digits as its factorization.

70985513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 70985513 is about 8425.2900840268. The cubic root of 70985513 is about 414.0536096337.

The spelling of 70985513 in words is "seventy million, nine hundred eighty-five thousand, five hundred thirteen".