70999109 has 2 divisors, whose sum is σ = 70999110. Its totient is φ = 70999108.

The previous prime is 70999087. The next prime is 70999121. The reversal of 70999109 is 90199907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41242084 + 29757025 = 6422^2 + 5455^2 .

It is a cyclic number.

It is not a de Polignac number, because 70999109 - 2¹² = 70995013 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70999109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70999129) 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, 35499554 + 35499555.

It is an arithmetic number, because the mean of its divisors is an integer number (35499555).

Almost surely, 2^70999109 is an apocalyptic number.

It is an amenable number.

70999109 is a deficient number, since it is larger than the sum of its proper divisors (1).

70999109 is an equidigital number, since it uses as much as digits as its factorization.

70999109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 70999109 is about 8426.0969018876. The cubic root of 70999109 is about 414.0800427901.

The spelling of 70999109 in words is "seventy million, nine hundred ninety-nine thousand, one hundred nine".