70690289 has 2 divisors, whose sum is σ = 70690290. Its totient is φ = 70690288.

The previous prime is 70690283. The next prime is 70690343. The reversal of 70690289 is 98209607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65739664 + 4950625 = 8108^2 + 2225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70690289 is a prime.

It is not a weakly prime, because it can be changed into another prime (70690283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35345144 + 35345145.

It is an arithmetic number, because the mean of its divisors is an integer number (35345145).

Almost surely, 2^70690289 is an apocalyptic number.

It is an amenable number.

70690289 is a deficient number, since it is larger than the sum of its proper divisors (1).

70690289 is an equidigital number, since it uses as much as digits as its factorization.

70690289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 70690289 is about 8407.7517208823. The cubic root of 70690289 is about 413.4788049495.

The spelling of 70690289 in words is "seventy million, six hundred ninety thousand, two hundred eighty-nine".