70145671 has 2 divisors, whose sum is σ = 70145672. Its totient is φ = 70145670.

The previous prime is 70145641. The next prime is 70145683. The reversal of 70145671 is 17654107.

It is a strong prime.

It is an emirp because it is prime and its reverse (17654107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70145671 - 2¹³ = 70137479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70145641) 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, 35072835 + 35072836.

It is an arithmetic number, because the mean of its divisors is an integer number (35072836).

Almost surely, 2^70145671 is an apocalyptic number.

70145671 is a deficient number, since it is larger than the sum of its proper divisors (1).

70145671 is an equidigital number, since it uses as much as digits as its factorization.

70145671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 70145671 is about 8375.3012483134. The cubic root of 70145671 is about 412.4142136879.

Adding to 70145671 its reverse (17654107), we get a palindrome (87799778).

The spelling of 70145671 in words is "seventy million, one hundred forty-five thousand, six hundred seventy-one".