70702009 has 4 divisors (see below), whose sum is σ = 80802304. Its totient is φ = 60601716.

The previous prime is 70702007. The next prime is 70702061. The reversal of 70702009 is 90020707.

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.

It is not a de Polignac number, because 70702009 - 2¹ = 70702007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70702007) 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, 5050137 + ... + 5050150.

It is an arithmetic number, because the mean of its divisors is an integer number (20200576).

Almost surely, 2^70702009 is an apocalyptic number.

It is an amenable number.

70702009 is a deficient number, since it is larger than the sum of its proper divisors (10100295).

70702009 is a wasteful number, since it uses less digits than its factorization.

70702009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100294.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 70702009 is about 8408.4486678578. The cubic root of 70702009 is about 413.5016544049.

The spelling of 70702009 in words is "seventy million, seven hundred two thousand, nine".