70571689 has 2 divisors, whose sum is σ = 70571690. Its totient is φ = 70571688.

The previous prime is 70571653. The next prime is 70571707. The reversal of 70571689 is 98617507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 3003289 = 8220^2 + 1733^2 .

It is an emirp because it is prime and its reverse (98617507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70571689 - 2⁷ = 70571561 is a prime.

It is not a weakly prime, because it can be changed into another prime (70571489) 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, 35285844 + 35285845.

It is an arithmetic number, because the mean of its divisors is an integer number (35285845).

Almost surely, 2^70571689 is an apocalyptic number.

It is an amenable number.

70571689 is a deficient number, since it is larger than the sum of its proper divisors (1).

70571689 is an equidigital number, since it uses as much as digits as its factorization.

70571689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 70571689 is about 8400.6957449964. The cubic root of 70571689 is about 413.2474387216.

The spelling of 70571689 in words is "seventy million, five hundred seventy-one thousand, six hundred eighty-nine".