70009081 has 2 divisors, whose sum is σ = 70009082. Its totient is φ = 70009080.

The previous prime is 70009073. The next prime is 70009087. The reversal of 70009081 is 18090007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50126400 + 19882681 = 7080^2 + 4459^2 .

It is a cyclic number.

It is not a de Polignac number, because 70009081 - 2³ = 70009073 is a prime.

It is a super-2 number, since 2×70009081² = 9802542844929122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70009087) 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, 35004540 + 35004541.

It is an arithmetic number, because the mean of its divisors is an integer number (35004541).

Almost surely, 2^70009081 is an apocalyptic number.

It is an amenable number.

70009081 is a deficient number, since it is larger than the sum of its proper divisors (1).

70009081 is an equidigital number, since it uses as much as digits as its factorization.

70009081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 70009081 is about 8367.1429412913. The cubic root of 70009081 is about 412.1463508254.

Adding to 70009081 its reverse (18090007), we get a palindrome (88099088).

The spelling of 70009081 in words is "seventy million, nine thousand, eighty-one".