70664239 has 2 divisors, whose sum is σ = 70664240. Its totient is φ = 70664238.

The previous prime is 70664233. The next prime is 70664261. The reversal of 70664239 is 93246607.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70664239 - 2⁵ = 70664207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70664198 and 70664207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70664233) 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, 35332119 + 35332120.

It is an arithmetic number, because the mean of its divisors is an integer number (35332120).

Almost surely, 2^70664239 is an apocalyptic number.

70664239 is a deficient number, since it is larger than the sum of its proper divisors (1).

70664239 is an equidigital number, since it uses as much as digits as its factorization.

70664239 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 37.

The square root of 70664239 is about 8406.2024125047. The cubic root of 70664239 is about 413.4280085041.

The spelling of 70664239 in words is "seventy million, six hundred sixty-four thousand, two hundred thirty-nine".