70609009 has 4 divisors (see below), whose sum is σ = 70626304. Its totient is φ = 70591716.

The previous prime is 70608983. The next prime is 70609027. The reversal of 70609009 is 90090607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90090607 = 83 ⋅1085429.

It is a cyclic number.

It is not a de Polignac number, because 70609009 - 2⁵ = 70608977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70609309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264 + ... + 11950.

It is an arithmetic number, because the mean of its divisors is an integer number (17656576).

Almost surely, 2^70609009 is an apocalyptic number.

It is an amenable number.

70609009 is a deficient number, since it is larger than the sum of its proper divisors (17295).

70609009 is a wasteful number, since it uses less digits than its factorization.

70609009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17294.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 70609009 is about 8402.9166960050. The cubic root of 70609009 is about 413.3202709336.

The spelling of 70609009 in words is "seventy million, six hundred nine thousand, nine".