70219999 has 2 divisors, whose sum is σ = 70220000. Its totient is φ = 70219998.

The previous prime is 70219997. The next prime is 70220023. The reversal of 70219999 is 99991207.

It is a weak prime.

It is an emirp because it is prime and its reverse (99991207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70219999 - 2¹ = 70219997 is a prime.

Together with 70219997, it forms a pair of twin primes.

It is a Chen prime.

70219999 is a modest number, since divided by 9999 gives 7021 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70219997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35109999 + 35110000.

It is an arithmetic number, because the mean of its divisors is an integer number (35110000).

Almost surely, 2^70219999 is an apocalyptic number.

70219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

70219999 is an equidigital number, since it uses as much as digits as its factorization.

70219999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 70219999 is about 8379.7374063869. The cubic root of 70219999 is about 412.5598301952.

It can be divided in two parts, 7021 and 9999, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 70219999 in words is "seventy million, two hundred nineteen thousand, nine hundred ninety-nine".