70689539 has 2 divisors, whose sum is σ = 70689540. Its totient is φ = 70689538.

The previous prime is 70689533. The next prime is 70689547. The reversal of 70689539 is 93598607.

It is a weak prime.

It is an emirp because it is prime and its reverse (93598607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70689539 - 2²⁴ = 53912323 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 70689493 and 70689502.

It is not a weakly prime, because it can be changed into another prime (70689533) 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, 35344769 + 35344770.

It is an arithmetic number, because the mean of its divisors is an integer number (35344770).

Almost surely, 2^70689539 is an apocalyptic number.

70689539 is a deficient number, since it is larger than the sum of its proper divisors (1).

70689539 is an equidigital number, since it uses as much as digits as its factorization.

70689539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 70689539 is about 8407.7071190664. The cubic root of 70689539 is about 413.4773426544.

The spelling of 70689539 in words is "seventy million, six hundred eighty-nine thousand, five hundred thirty-nine".