70818089 has 2 divisors, whose sum is σ = 70818090. Its totient is φ = 70818088.

The previous prime is 70818071. The next prime is 70818109. The reversal of 70818089 is 98081807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 30913600 = 6317^2 + 5560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70818089 is a prime.

It is a super-2 number, since 2×70818089² = 10030403459223842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70818019) 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, 35409044 + 35409045.

It is an arithmetic number, because the mean of its divisors is an integer number (35409045).

Almost surely, 2^70818089 is an apocalyptic number.

It is an amenable number.

70818089 is a deficient number, since it is larger than the sum of its proper divisors (1).

70818089 is an equidigital number, since it uses as much as digits as its factorization.

70818089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 70818089 is about 8415.3484182178. The cubic root of 70818089 is about 413.7278291531.

The spelling of 70818089 in words is "seventy million, eight hundred eighteen thousand, eighty-nine".