70909009 has 2 divisors, whose sum is σ = 70909010. Its totient is φ = 70909008.

The previous prime is 70908991. The next prime is 70909019. The reversal of 70909009 is 90090907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 26553409 = 6660^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 70909009 - 2¹⁵ = 70876241 is a prime.

It is not a weakly prime, because it can be changed into another prime (70909019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35454504 + 35454505.

It is an arithmetic number, because the mean of its divisors is an integer number (35454505).

Almost surely, 2^70909009 is an apocalyptic number.

It is an amenable number.

70909009 is a deficient number, since it is larger than the sum of its proper divisors (1).

70909009 is an equidigital number, since it uses as much as digits as its factorization.

70909009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 70909009 is about 8420.7487196805. The cubic root of 70909009 is about 413.9048086432.

The spelling of 70909009 in words is "seventy million, nine hundred nine thousand, nine".