70340989 has 2 divisors, whose sum is σ = 70340990. Its totient is φ = 70340988.

The previous prime is 70340947. The next prime is 70341013. The reversal of 70340989 is 98904307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70056900 + 284089 = 8370^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 70340989 - 2⁹ = 70340477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70340909) 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, 35170494 + 35170495.

It is an arithmetic number, because the mean of its divisors is an integer number (35170495).

Almost surely, 2^70340989 is an apocalyptic number.

It is an amenable number.

70340989 is a deficient number, since it is larger than the sum of its proper divisors (1).

70340989 is an equidigital number, since it uses as much as digits as its factorization.

70340989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 70340989 is about 8386.9534993345. The cubic root of 70340989 is about 412.7966429435.

The spelling of 70340989 in words is "seventy million, three hundred forty thousand, nine hundred eighty-nine".