70436609 has 2 divisors, whose sum is σ = 70436610. Its totient is φ = 70436608.

The previous prime is 70436521. The next prime is 70436633. The reversal of 70436609 is 90663407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 9284209 = 7820^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 70436609 - 2¹⁶ = 70371073 is a prime.

It is a super-2 number, since 2×70436609² = 9922631774837762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70436659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35218304 + 35218305.

It is an arithmetic number, because the mean of its divisors is an integer number (35218305).

Almost surely, 2^70436609 is an apocalyptic number.

It is an amenable number.

70436609 is a deficient number, since it is larger than the sum of its proper divisors (1).

70436609 is an equidigital number, since it uses as much as digits as its factorization.

70436609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 70436609 is about 8392.6520838171. The cubic root of 70436609 is about 412.9836071562.

The spelling of 70436609 in words is "seventy million, four hundred thirty-six thousand, six hundred nine".