70320889 has 2 divisors, whose sum is σ = 70320890. Its totient is φ = 70320888.

The previous prime is 70320847. The next prime is 70320907. The reversal of 70320889 is 98802307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62283664 + 8037225 = 7892^2 + 2835^2 .

It is an emirp because it is prime and its reverse (98802307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70320889 - 2¹¹ = 70318841 is a prime.

It is not a weakly prime, because it can be changed into another prime (70320589) 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, 35160444 + 35160445.

It is an arithmetic number, because the mean of its divisors is an integer number (35160445).

Almost surely, 2^70320889 is an apocalyptic number.

It is an amenable number.

70320889 is a deficient number, since it is larger than the sum of its proper divisors (1).

70320889 is an equidigital number, since it uses as much as digits as its factorization.

70320889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 70320889 is about 8385.7551240183. The cubic root of 70320889 is about 412.7573201955.

The spelling of 70320889 in words is "seventy million, three hundred twenty thousand, eight hundred eighty-nine".