70521089 has 2 divisors, whose sum is σ = 70521090. Its totient is φ = 70521088.

The previous prime is 70521079. The next prime is 70521097. The reversal of 70521089 is 98012507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47720464 + 22800625 = 6908^2 + 4775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70521089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70521079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35260544 + 35260545.

It is an arithmetic number, because the mean of its divisors is an integer number (35260545).

Almost surely, 2^70521089 is an apocalyptic number.

It is an amenable number.

70521089 is a deficient number, since it is larger than the sum of its proper divisors (1).

70521089 is an equidigital number, since it uses as much as digits as its factorization.

70521089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 70521089 is about 8397.6835496463. The cubic root of 70521089 is about 413.1486487760.

The spelling of 70521089 in words is "seventy million, five hundred twenty-one thousand, eighty-nine".