70087009 has 2 divisors, whose sum is σ = 70087010. Its totient is φ = 70087008.

The previous prime is 70086967. The next prime is 70087037. The reversal of 70087009 is 90078007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67699984 + 2387025 = 8228^2 + 1545^2 .

It is a cyclic number.

It is not a de Polignac number, because 70087009 - 2¹⁹ = 69562721 is a prime.

It is not a weakly prime, because it can be changed into another prime (70087079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35043504 + 35043505.

It is an arithmetic number, because the mean of its divisors is an integer number (35043505).

Almost surely, 2^70087009 is an apocalyptic number.

It is an amenable number.

70087009 is a deficient number, since it is larger than the sum of its proper divisors (1).

70087009 is an equidigital number, since it uses as much as digits as its factorization.

70087009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 70087009 is about 8371.7984328339. The cubic root of 70087009 is about 412.2992159054.

The spelling of 70087009 in words is "seventy million, eighty-seven thousand, nine".