70500009 has 4 divisors (see below), whose sum is σ = 94000016. Its totient is φ = 47000004.

The previous prime is 70500007. The next prime is 70500011. The reversal of 70500009 is 90000507.

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: 90000507 = 3 ⋅30000169.

It is an interprime number because it is at equal distance from previous prime (70500007) and next prime (70500011).

It is not a de Polignac number, because 70500009 - 2¹ = 70500007 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70500007) 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, 11749999 + ... + 11750004.

It is an arithmetic number, because the mean of its divisors is an integer number (23500004).

Almost surely, 2^70500009 is an apocalyptic number.

It is an amenable number.

70500009 is a deficient number, since it is larger than the sum of its proper divisors (23500007).

70500009 is a wasteful number, since it uses less digits than its factorization.

70500009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23500006.

The product of its (nonzero) digits is 315, while the sum is 21.

The square root of 70500009 is about 8396.4283478155. The cubic root of 70500009 is about 413.1074788623.

The spelling of 70500009 in words is "seventy million, five hundred thousand, nine".